Question

Find the surface area of a sphere with a radius of 8 cm

Answer 1

`\large\boxed{803.8\ cm^2}`

Explanation:

The formula of a surface area of a sphere:

`S.A.=4\pi R^2`

R - radius

We have R = 8 cm. Substitute:

`S.A.=4\pi(8^2)=4\pi(64)=256\pi\ cm^2`

`\pi\approx3.14`

Substitute:

`S.A.\approx256(3.14)=803.84\ cm^2`