Question

Find the surface area of a sphere with a radius of 10 in. Express your answer in terms of π.

Answer 1

Given:

Radius of the sphere = 10 in

To find:

The surface area of a sphere

Solution:

Surface area of sphere:

$SA =4\pi r^2$

$SA =4\times \pi \times 10^2$

$SA=\pi \times 400$

$SA=400\pi$ in²

The surface area of a sphere is 400π in².