Question

Find the volume of a sphere, to the nearest tenth, that has a radius of 7cm

Answer 1

The formula of a volume of a sphere with radius R:

`V=(4)/(3)\pi R^3`

We have R = 7cm. Substitute:

`V=(4)/(3)\pi\cdot7^3=(4)/(3)\pi\cdot343=(1372\pi)/(3)\ cm^3`

`(1372\pi)/(3)\approx1436.0\ cm^3`

Answer: V = 1436.0 cm³