A kickball is a sphere, so to solve this, we are going to use the formula for the volume of a sphere:

where

is the volume of the sphere.

is the diameter of the sphere.
We know form our problem that the diameter of the kickball is 10 inches; since the kickball is a sphere,

. Lets replace that value in our formula to find

:



We can conclude that the volume of the kickball is
523.6 cubic inches.