The surface area of a sphere having a diameter of 8 inches is:

Question

asked Nov 17, 2020 231k views

2 Answers

Corbin March · Answer 1 · 2020-11-23T19:18:45+0000

Answer:
$A = 201.06\ in^2$ or
$A = 64\pi\ in^2$

Explanation:

The surface area of a sphere is calculated by the following formula

$A = 4\pi r^2$

Where r is the radius of the sphere

In this case we know that the diameter d of the sphere is

$d=8\ inches$

So the radius r is:

$r=(d)/(2)\\\\r=(8)/(2)\\\\r=4\ inches$

So the surface area of the sphere is:

$A = 4\pi (4)^2$

$A = 64\pi$

$A = 201.06\ in^2$