A regulation basketball has a diameter of about 9 inches. What is the best approximation of the volume of the ball?

1 Answer
May 26, 2016

381.69 cubic inches.

Explanation:

The basketball is almost a sphere. The volume of the sphere is
#v=4/3pir^3# where #r# is the radius. You have the diameter, that is the double of the radius, so #r=9/2=4.5# inches.
Then your volume is

#v=4/3pi4.5^3=381.69# cubic inches.