Question

The surface area of sphere is 616cm^2 . Find its radius

Answer 1

Ello There!

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Given values

SA of Sphere = 616cm²

We know that,

Surface area of a sphere = 4πr²

Here the value given for Surface are of the sphere = 616

Therfore, we can substitute 4πr² in the equation below ↓↓

Surface area of a sphere = 616cm²

4πr² = 616 (Surface area of a sphere = 4πr²)

4 × $\frac{22}{7}$ × r² = 616

4r² = 616 × 7 / 22

4r² = 4312/22 (616 × 7 = 4312)

4r² =  196 (4312 divided by 22 = 196)

r² = $\frac{196}{4}$

r² = 49

Square of r goes to the other side of the equal symbol,

r = √49

r = 7cm

∴ The radius of the sphere = 7cm

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Thank You!

@Tomboyish44