and sum the area of all the shaded portions as t → 0 noting that δt = Rδθ. A = ∫2π 0 2RRdθ. or. A = 4πR2. Or more directly A = ∫2πRt = 02Rdt. † this is the same as the area of the 2R × t face of the wedge which leads to a simple proof that the surface area of a sphere is the same as that of its surrounding cylinder.The free sphere surface area calculator calculates: Radius of the sphere. Volume of the sphere. Surface Area of the sphere. Circumference of the sphere. No matter what parameter you select as your input, the radius of a sphere calculator will enumerate all of these parameters precisely. Also, the whole information is displayed in the form of a ...4. Yes, the mapping preserves area of any shape. You can convince yourself of this by taking by small patches on the sphere, between two constant latitude lines and two longitude lines, which I believe is what they did with the state of Colorado and the sate of Wyoming. Anyway, any nice enough shape is made up, to sufficient accuracy, by a ...A spherical segment is a portion of the sphere included between two parallel planes. The curved surface area of the spherical zone - which excludes the top and bottom bases: Curved surface area $=2\pi R h$ The surface area - which includes the top and bottom bases: Surface area $=2\pi Rh + \pi r_1^2 + \pi r_2^2 = \pi(2Rh + r_1^2 + r_2^2)$ Formula used: The surface area of a sphere = 4πr2 Shortcut Trick Surface area of a sphere (A) = 4πr2 ⇒ r2 ∝ A ⇒ r ∝&nbs.Calculate volume and surface area of sphere in C++. Ask Question Asked 8 years, 2 months ago. Modified 2 years ago. Viewed 13k times 0 I am trying to write a program which asks for the radius of a sphere, and depending on if the user inputs if they want the volume or the surface area, then that's what the program will return. ...Concrete stains can be used to give plain concrete a beautiful new look. Watch this video for tips on how to test and prepare concrete surfaces for staining. Expert Advice On Impro...The surface area of an object or a body is the total area of all its exposed surfaces, i.e., SA is simply the outside area of an object.On the other hand, Volume refers to the amount of space occupied by the …Formula used: The surface area of a sphere = 4πr2 Shortcut Trick Surface area of a sphere (A) = 4πr2 ⇒ r2 ∝ A ⇒ r ∝&nbs.Test your understanding of Volume and surface area with these % (num)s questions. Start test. Volume and surface area help us measure the size of 3D objects. We’ll start with the volume and surface area of rectangular prisms. From there, we’ll tackle trickier objects, such as cones and spheres. The problem is that the expression with spherical unit vectors does not take into account the coordinates of the point. In other words, $\hat n=(1,0,0)$ for every $(r,\theta,\phi)$. So, my second approach was calculate it via parametrization of the sphere.The problem is that the expression with spherical unit vectors does not take into account the coordinates of the point. In other words, $\hat n=(1,0,0)$ for every $(r,\theta,\phi)$. So, my second approach was calculate it via parametrization of the sphere.The formula for calculating the surface area of sphere is given by: SA = 4 × π × r2. SA = 4 × 3.14 × 112. SA = 1519.76. The surface area of sphere is 1519.76 cm2. Example 5: A hemisphere has the radius measured to 8.3 cm. Find the surface area of it without the base. Solution: r = 8.3 cm. 3 Answers. Sorted by: 3. def surfaceArea (self): self.area = 4 * 3.14 * (r*r) return (self.area) def getVolume (self): self.volume = (4/3) * 3.14 * (r * r * r) return (self.volume) In functions above change all r's to self.radius cause self.radius is the corresponding attribute of your class not r ... also there are some minor mistakes in your ...Want to know how to clean lime from windows and other surfaces? Check out our guide How to Clean Lime from Windows and Other Surfaces and find out! Advertisement Lime spots from ha...3 Answers. Sorted by: 3. def surfaceArea (self): self.area = 4 * 3.14 * (r*r) return (self.area) def getVolume (self): self.volume = (4/3) * 3.14 * (r * r * r) return (self.volume) In functions above change all r's to self.radius cause self.radius is the corresponding attribute of your class not r ... also there are some minor mistakes in your ...The formula for calculating the surface area of sphere is given by: SA = 4 × π × r2. SA = 4 × 3.14 × 112. SA = 1519.76. The surface area of sphere is 1519.76 cm2. Example 5: A hemisphere has the radius measured to 8.3 cm. Find the surface area of it without the base. Solution: r = 8.3 cm. The surface area of a sphere is 4πr 2. Since a hemisphere is half of a sphere, its surface area, S, is half the surface area of a sphere plus the area of the circular base (shown in gray) created by intersection of the plane and sphere: S = 4πr 2 /2 + πr 2 = 3πr 2. where r is the radius of the hemisphere. Calculator. Enter the radius, diameter, surface area or volume of a Sphere to find the other three. The calculations are done "live": How to Calculate the Volume and Surface Area Example 1: curved surface area, radius of a hemisphere is given. Calculate the curved surface area of a hemisphere with radius 12 \ cm. 12 cm. Give your answer to 1 1 decimal place. Write down the formula for the surface area of a …Find the surface area and volume of composite figures such as cylinders and spheres or cones and spheres. Video – Lesson & Examples. 58 min. Introduction to spheres; 00:00:22 – How to find the …The surface area of the sphere pictured on the left is: A = 4π ⋅ r2 A = 4π ⋅ 32 A = 36π = 113.1 A = 4 π ⋅ r 2 A = 4 π ⋅ 3 2 A = 36 π = 113.1.First, remeber that the lateral surface area of a right conical frustum is. (1) π ( r 1 + r 2) S = 2 π m S. where r 1 is radius of the base, r 2 is the radius of the top, m = r 1 + r 2 2, the "mid-radius", and S is the lateral (slant) height. Now, consider the following figure.Deriving the formula. Proof and explanation that Surface Area of a Sphere is equal to 4πr^2 using geometry and algebra.The surface area of a sphere is the ar...19. I help mentor some really young, bright kids in mathematics. We were looking at geometric properties of various shapes, and one of the kids noted that the surface area of a sphere S = 4πr2 S = 4 π r 2 contains the equation for the area of a circle A = πr2 A = π r 2. She was a bit confused why the factor of 4 4 was mysteriously there.The surface area of the sphere pictured on the left is: A = 4π ⋅ r2 A = 4π ⋅ 32 A = 36π = 113.1 A = 4 π ⋅ r 2 A = 4 π ⋅ 3 2 A = 36 π = 113.1.It can be very tedious to find the area of each face individually, so we have surface area formulas for each of the geometrical figures. Some of the formulas are listed below: Total surface area of a cube = 6 × (side) 2. Surface area of sphere = 4πr 2. Total surface area of cone = πr (r + l)Because the sphere has the smallest surface area, air bubbles adopt the form of a spherical sphere. The sphere would have the most volume out of all the forms with the same surface area. 4/3 r3 is the formula for sphere volume.Formula for the surface area of sphere = 4πr 2 = 4×(22/7)×7 2 = 616. Surface area of a sphere is 616 cm 2 (ii) Radius (r) of sphere = 21/2 = 10.5 cm. Surface area of a sphere = 4πr 2 = 4×(22/7)×10.5 2 = 1386. Surface area of a sphere is 1386 cm 2. Therefore, the surface area of a sphere having a diameter 21 cm is 1386 cm 2This may not necessarily be the cross-sectional area of the vehicle, depending on where the cross-section is taken. For example, for a sphere = (note this is not the surface area = ). For airfoils, the reference area is the nominal wing area. Since this tends to be large compared to the frontal area, the resulting drag coefficients tend to be ...Surface area and volume are calculated for any three-dimensional geometrical shape. The surface area of any given object is the area or region occupied by the surface of the object. Whereas volume is the amount of space available in an object. In geometry, there are different shapes and sizes such as sphere, cube, cuboid, cone, cylinder, etc.Surface Area of a Sphere. A sphere is a body bounded by a surface whose every point is equidistant (i.e. the same distance) from a fixed point, called the centre. For example, a shot (a heavy iron ball) is a solid sphere and a tennis ball is a hollow sphere. One-half of a sphere is called a hemisphere. Archimedes discovered that a cylinder that ...Example: Find the surface area of a sphere of radius 7 cm. Step 1: Note the radius of the given sphere. Here, the radius of the sphere is 47 cm. Step 2: We know …How to find the surface to volume ratio of a sphere? A÷V = 3 ⁄ R. The value of π. The pi (π) is approximately equal to 3.14159265359 and represents the ratio of any circle's circumference to its diameter, or the ratio of a circle's area to the square of its radius in Euclidean space. Reference (ID: N/A) 1.Radius, r =14 cm. By the formula, Surface area of a sphere = 4πr 2. On substitution, we get, SA = 4 x 3.14 x 14 x 14. = 2,461.76 cm 2. Example 2. The diameter of a baseball is 18 cm. Find the surface area of the ball. Solution. When finding the surface area, in addition to halving the surface area of a sphere you will also need to calculate the area of the circle at the base. Question Calculate the surface area of the ... It can be very tedious to find the area of each face individually, so we have surface area formulas for each of the geometrical figures. Some of the formulas are listed below: Total surface area of a cube = 6 × (side) 2. Surface area of sphere = 4πr 2. Total surface area of cone = πr (r + l)The formula for the volume of a sphere is V = 4/3 π r³, where V = volume and r = radius. The radius of a sphere is half its diameter. So, to calculate the surface area of a sphere given the diameter of the sphere, you can first calculate the radius, then the volume. Created by Sal Khan and Monterey Institute for Technology and Education. We get more details about the Microsoft Surface tablet, Apple announces a special event, Boxee releases a DVR, and Gmail expands its beta for new search features. We get more detai...Top answer: The formula for the surface area of a sphere is given as: Surface Area = 4πr² Given that the Read more. 1.Find the surface area for a sphere with a radius of 10 feet. Round to the nearest whole number. 1,256 ft2 4,189 ft2 1,089 ft2. Top answer: A B D B B 100% Read more.To calculate the surface area of a sphere, you can use the PI function together with the exponent operator (^). In the example shown, the formula in C5, copied down, is: =4*PI ()*B5^2 which calculates the surface area of a sphere with the radius given in column B. Units are indicated generically with "u", and the result is units squared (u2). Surface Area of a Sphere = 4 pi r 2 (r is radius of circle) ... Surface Area = 2(Area of top) + (perimeter of top)* height Surface Area = 2(pi r 2) + (2 pi r)* h In words, the easiest way is to think of a can. The surface area is the areas of all the parts needed to cover the can. That's the top, the bottom, and the paper label that wraps ...To find the surface area of 3D shapes with curved surfaces such as spheres and cones (higher GCSE only), there are special formulas you should use. Surface area of a sphere =4 \times \pi \times radius^{2} Curved surface area of a cone =\pi \times radius \times length . Step-by-step guide: How to calculate surface areaThe intersection of two spherical surfaces is a circle whose plane is perpendicular to the line joining the centers of the spheres and whose center is on that line. (See figure to the right.) A plane perpendicular to a radius at its extremity is tangent to the sphere. Formulas for a Sphere. Surface Area, A The surface area of a sphere is equal ...The surface area of a sphere is the region covered by its outer surface. On the other hand, the volume represents the three-dimensional space occupied by the figure. We can calculate the surface area of a sphere using the formula A=4πr² and we can calculate its volume using the formula V= (4/3)πr³, where r is the radius of the sphere. We assume the radius = 1. 0 ϕ 2π 0 ϕ 2 π, from the half-plane y = 0, x >= 0. From (a) and (b) it follows that an element of area on the unit sphere centered at the origin in 3-space is just dphi dz. Then the integral of a function f (phi,z) over the spherical surface is just. ∫−1≤z≤1,0≤ϕ≤2π f(ϕ, z)dϕdz ∫ − 1 ≤ z ≤ 1 ...Celebrating National Paranormal Day by watching the skies this May 3rd? Well, whether you’re a believer or a skeptic, today certainly has us feeling a bit like that poster from The...In your case the curve is a semi circle revolved about the x-axis. If the centroid of the semi-circle is d units apart from the x-axis, then the surface area of the sphere is. 2 π d × π R. where R is radius of the sphere. Apparently d = 2 R π so you get the correct answer for the surface area. Share.The hot plates smash the cheesy tubes into submission, creating a greater amount of surface area for crisping. Out of all the things I’ve put in my waffle iron, cheese is probably ...The surface area of the sphere pictured on the left is: A = 4π ⋅ r2 A = 4π ⋅ 32 A = 36π = 113.1 A = 4 π ⋅ r 2 A = 4 π ⋅ 3 2 A = 36 π = 113.1. Example: Find the surface area of a sphere of radius 7 cm. Step 1: Note the radius of the given sphere. Here, the radius of the sphere is 47 cm. Step 2: We know …Table 6.5.2: Surface Area formulas; Geometric Figure . Surface Area Formula . Surface Area Meaning \(S A=2 B+P h\) Find the area of each face. Add up all areas. \(S A=B+\dfrac{1}{2} s P\) Find the area of each face. Add up all areas. \(S A=2 B+2 \pi r h\) Find the area of the base, times 2, then add the areas to the areas of the …Formula used: The surface area of a sphere = 4πr2 Shortcut Trick Surface area of a sphere (A) = 4πr2 ⇒ r2 ∝ A ⇒ r ∝&nbs.The surface area of an object or a body is the total area of all its exposed surfaces, i.e., SA is simply the outside area of an object.On the other hand, Volume refers to the amount of space occupied by the …Oct 4, 2023 · This online calculator will calculate the 3 unknown values of a sphere given any 1 known variable including radius r, surface area A, volume V and circumference C. It will also give the answers for volume, surface area and circumference in terms of PI π. A sphere is a set of points in three dimensional space that are located at an equal ... Surface Area. Surface area is a two-dimensional measurement that is the total area of all surfaces that bound a solid. The basic unit of area is the square unit. Surface Area of a Sphere: S A = 4 π r 2. Volume. To find the volume of any solid you must figure out how much space it occupies. The basic unit of volume is the cubic unit. Volume …A spherical segment is a portion of the sphere included between two parallel planes. The curved surface area of the spherical zone - which excludes the top and bottom bases: Curved surface area $=2\pi R h$ The surface area - which includes the top and bottom bases: Surface area $=2\pi Rh + \pi r_1^2 + \pi r_2^2 = \pi(2Rh + r_1^2 + r_2^2)$ Example 1: surface area of a sphere given the radius. Find the surface area of the sphere below. Write your answer to 1 1 decimal place. Write down the formula. To answer the question we need to use the formula for the surface area of a sphere: \text {Surface area}=4 \pi r^2 Surface area = 4πr2. Surface Area of a Sphere. The area of a disk enclosed by a circle of radius R is pi *R 2 . The formula for the circumference of a circle of radius R is 2*Pi*R. A simple calculus check reveals that the latter is the derivative of the former with respect to R. Similarly, the volume of a ball enclosed by a sphere of radius R is (4/3)*Pi*R 3 . A sphere of radius r has surface area 4πr 2.. The surface area (symbol A) of a solid object is a measure of the total area that the surface of the object occupies. The mathematical definition of surface area in the presence of curved surfaces is considerably more involved than the definition of arc length of one-dimensional curves, or of the surface area for polyhedra (i.e., objects with flat ... A sphere of radius r has surface area 4πr 2.. The surface area (symbol A) of a solid object is a measure of the total area that the surface of the object occupies. The mathematical definition of surface area in the presence of curved surfaces is considerably more involved than the definition of arc length of one-dimensional curves, or of the surface area for polyhedra (i.e., objects with flat ... 21 Feb 2022 ... In this lesson, we will work through an example of how to use the surface area of a sphere formula to solve math problems.1. Calculate the surface area of the following: 1) the portion of the sphere x2 +y2 +z2 = 16z x 2 + y 2 + z 2 = 16 z that lies within the paraboloid z =x2 +y2 z = x 2 + y 2. Attempt:so by rearranging the eqn given we have a sphere with centre …1. Calculate the surface area of the following: 1) the portion of the sphere x2 +y2 +z2 = 16z x 2 + y 2 + z 2 = 16 z that lies within the paraboloid z =x2 +y2 z = x 2 + y 2. Attempt:so by rearranging the eqn given we have a sphere with centre …Jan 16, 2024 · To find the surface area of a sphere, use the formula (4πr 2 ), where r = the radius of the circle. Steps Download Article 1 Know the parts of the equation, Surface Area = 4πr2. This nearly ancient formula is still the easiest way to determine the surface area of a sphere. [2] 2 Sept 2018 ... Today, we derive the formula for the surface area of a sphere using integration.The surface area of a sphere is given by the formula Area = 4 π r 2 Where r is the radius of the sphere. In the figure above, drag the orange dot to change the radius of the sphere …Hemisphere Formulas in terms of radius r: Volume of a hemisphere: V = (2/3) π r 3. Circumference of the base of a hemisphere: C = 2 π r. Curved surface area of a hemisphere (1 side, external only): A = 2 π r 2. Calculate the base surface area of a hemisphere ( a circle ): B = π r 2.26 Feb 2013 ... Finding the Surface Area of a Sphere.The hot plates smash the cheesy tubes into submission, creating a greater amount of surface area for crisping. Out of all the things I’ve put in my waffle iron, cheese is probably ...The free sphere surface area calculator calculates: Radius of the sphere. Volume of the sphere. Surface Area of the sphere. Circumference of the sphere. No matter what parameter you select as your input, the radius of a sphere calculator will enumerate all of these parameters precisely. Also, the whole information is displayed in the form of a ...Microsoft has unveiled its latest tablet computer, the Surface Pro 3. The quick sell: It’s designed to replace both a tablet and laptop with one device—a relatively large tablet wi...Review how to find the surface area of a sphere using the formula SA = 4(pi)(r)^2.Visit www.maisonetmath.com for more practice.Jan 30, 2024 · Surface area of a sphere: A = 4πr², where r stands for the radius of the sphere. Surface area of a cube: A = 6a², where a is the side length. Surface area of a cylinder: A = 2πr² + 2πrh, where r is the radius and h is the height of the cylinder. Surface area of a cone: A = πr² + πr√(r² + h²), where r is the radius and h is the ... 4. Yes, the mapping preserves area of any shape. You can convince yourself of this by taking by small patches on the sphere, between two constant latitude lines and two longitude lines, which I believe is what they did with the state of Colorado and the sate of Wyoming. Anyway, any nice enough shape is made up, to sufficient accuracy, by a ...Radius, r =14 cm. By the formula, Surface area of a sphere = 4πr 2. On substitution, we get, SA = 4 x 3.14 x 14 x 14. = 2,461.76 cm 2. Example 2. The diameter of a baseball is 18 cm. Find the surface area of the ball. Solution. Review how to find the surface area of a sphere using the formula SA = 4(pi)(r)^2.Visit www.maisonetmath.com for more practice.The sphere has the minimum surface area for a given volume. OR. The sphere has the maximum volume for a given surface area. Let's simplify the three-dimensional problem into two-dimensions by considering the following statement: The circle has the maximum area for a given perimeter (boundary). Few things to consider while …To calculate the surface area of a sphere, you can use the PI function together with the exponent operator (^). In the example shown, the formula in C5, copied down, is: =4*PI ()*B5^2 which calculates the surface area of a sphere with the radius given in column B. Units are indicated generically with "u", and the result is units squared (u2). See full list on byjus.com Test your understanding of Volume and surface area with these % (num)s questions. Start test. Volume and surface area help us measure the size of 3D objects. We’ll start with the volume and surface area of rectangular prisms. From there, we’ll tackle trickier objects, such as cones and spheres.The hitch is that the width is not dr but is ds (see the figure). With a few calculus, you can find ds = R R2−r2√ dr → dA = 2πr R R2−r2√ dr. This is a method to find the area of the sphere. Of course, a simpler method consists in doing the job in spherical coordinates instead of Cartesian coordinates.Calculate sphere surface area step by step. Equations. Inequalities. Scientific Calculator. Scientific Notation Arithmetics. Complex Numbers. Polar/Cartesian. Simultaneous Equations. System of Inequalities.Jan 18, 2024 · A sphere is a special object that has the lowest surface-to-volume ratio among all other closed surfaces with a given volume. It is just like a circle that encloses the largest area with a given perimeter compared to the other flat figures. If you want more general information about spheres, head to the sphere calc! Sony's Xplod subwoofers feature a unique pentagonal cone that provides a large surface area for high-performance bass output. Despite the pentagonal cone, the woofers are built int...A sphere is a round-shaped object in three-dimensional space. All points on a sphere’s surface are the same distance from its center point. Some examples of a sphere are a globe, m...Archimedes knew the volume of a sphere. . . . now he had to prove it! Archimedes built a sphere-like shape from cones and frustrums (truncated cones) He drew two shapes around the sphere's center -. one outside the sphere (circumscribed) so its volume was greater than the sphere's, and one inside the sphere (inscribed) so its volume was less ...
Surface Area of Sphere Examples. Example 1: If the radius of a sphere is 20 feet, find its surface area. (Use π = 3.14). Solution: Given, the radius 'r' of the sphere = 20 feet. The surface area of the sphere = 4πr 2 = 4 × π × 20 2 = 5024 feet 2. ∴ The surface area of the sphere is 5024 feet 2. . Earthwuake near me
The intersection of two spherical surfaces is a circle whose plane is perpendicular to the line joining the centers of the spheres and whose center is on that line. (See figure to the right.) A plane perpendicular to a radius at its extremity is tangent to the sphere. Formulas for a Sphere. Surface Area, A The surface area of a sphere is equal ...The surface area of a sphere is 4(3.14)R2where R is the radius of the sphere so the surface area of your dome is half of that. 2(314)R2 How do you find the surface area of a hemisphere? The surface area of a sphere is 4 π r2.The formula for the volume of a sphere is V = 4/3 π r³, where V = volume and r = radius. The radius of a sphere is half its diameter. So, to calculate the surface area of a sphere given the diameter of the sphere, you can first calculate the radius, then the volume. Created by Sal Khan and Monterey Institute for Technology and Education.First, remeber that the lateral surface area of a right conical frustum is. (1) π ( r 1 + r 2) S = 2 π m S. where r 1 is radius of the base, r 2 is the radius of the top, m = r 1 + r 2 2, the "mid-radius", and S is the lateral (slant) height. Now, consider the following figure.If you have ever attended (or tuned into) one of Monzo’s many community events, you are likely familiar with the work of Simon Balmain. An early employee of the challenger bank, he...Rate of change of surface area of sphere. Problem. Gas is escaping from a spherical balloon at the rate of 2 cm 3 /min. Find the rate at which the surface area is decreasing, in cm 2 /min, when the radius is 8 cm..The total surface area, lateral surface area and curved surface area of a sphere are equal, i.e, 4πr 2. The volume of a sphere of radius ‘r’ can be determined by the formula, V = 4/3 πr3 The radius of a sphere is the distance between the sphere's centre and any point on the sphere's surface. Hemisphere Formulas in terms of radius r: Volume of a hemisphere: V = (2/3) π r 3. Circumference of the base of a hemisphere: C = 2 π r. Curved surface area of a hemisphere (1 side, external only): A = 2 π r 2. Calculate the base surface area of a hemisphere ( a circle ): B = π r 2.A sphere is a perfectly round 3 dimensional object (i.e. a ball!). Enter in the radius of the sphere below to calculate the surface area of a sphere and use the formula for calculating the surface area of a sphere given below to work backwards if you have the surface area of a sphere and are trying to solve for the radius of a sphere. Also ...How to find the surface to volume ratio of a sphere? A÷V = 3 ⁄ R. The value of π. The pi (π) is approximately equal to 3.14159265359 and represents the ratio of any circle's circumference to its diameter, or the ratio of a circle's area to the square of its radius in Euclidean space. Reference (ID: N/A) 1.Surface Area of a Sphere = 4 pi r 2 (r is radius of circle) ... Surface Area = 2(Area of top) + (perimeter of top)* height Surface Area = 2(pi r 2) + (2 pi r)* h In words, the easiest way …The surface area of the sphere pictured on the left is: A = 4π ⋅ r2 A = 4π ⋅ 32 A = 36π = 113.1 A = 4 π ⋅ r 2 A = 4 π ⋅ 3 2 A = 36 π = 113.1. The uneven heating of the Earth’s surface is caused by the sun. This occurs because the Earth is a tilted sphere and the sun does not heat all its surfaces equally and because the ...The formula for the volume of a sphere is V = 4/3 π r³, where V = volume and r = radius. The radius of a sphere is half its diameter. So, to calculate the surface area of a sphere given the diameter of the sphere, you can first calculate the radius, then the volume. Created by Sal Khan and Monterey Institute for Technology and Education.Reclaimed wall paneling can do more than just cover a surface; it can transform an area in looks, style, and even function. Expert Advice On Improving Your Home Videos Latest View ...Step 1: Note down the radius of the sphere, in this case = 7cm. Step 2: We know that surface area of a sphere is 4πr2, so, let us use this formula for further calculations: S = 4πr2. S = 4 × 22 7 × 7 × 7. S = 4 × 22 × 7. S = 88 × 7. S = 616 square cm. So, the surface area of a sphere with radius 7 cm is 616 sq cm.A burn evaluation examines moderate to severe burn injuries. It looks at how deep in the skin a burn has gone (degree of burns) and how much of the body's surface area has been bur....