Question

What is the surface area of a sphere with a radius of 16 units?

Answer 1

Formula of surface area of a sphere is 4
`\pi r^(2)`.
Hence it is 4
`\pi 16^(2) ≈ 3216.99 ≈3217`

Answer 2

we know that

The surface area of a sphere is equal to

`SA=4\pi r^(2)`

where

r is the radius of the sphere

in this problem we have

`r=16\ units`

substitute in the formula

`SA=4\pi(16^(2))`

`SA=1,024\pi\ units^(2)`

or

`SA=3,216.99\ units^(2)`

therefore

the answer is

`SA=1,024\pi\ units^(2)`