the official size of a NCAA basketball has a circumference of almost 31.4 inches. find the amount of cubic inches of air that the basketball can hold.

Answer 1

C = 2πr = 31.4

Solve for r in terms of π.

V = (4πr^3)/3

Insert values to find volume (V).

Of course, there will be some small error, because you are not subtracting the thickness of the ball material.