Question

What is the surface ara of a sphere with a diameter of 16cm

32pi cm^2
256 pi cm^2
1,024 pi cm^2
126 pi cm^2

Answer 1

`256\pi {cm}^(2)`

Explanation:

surface area of a sphere=4πr^2

diametre=16

`radius = (diametre)/(2)`

radius=8

`surface \: area \: of \: sphere = 4 * \pi * {8}^(2)`

`\: \: \: \: = 4 * \pi * 64`

`\: \: \: \: = 256\pi {cm}^(2)`

Answer 2

1024pi cm²

Explanation:

4pi(16)²

4pi256

1024pi