Posted by rally on Wednesday, July 14, 2010 at 8:07pm.
what is the volume of earth if the diameter of earth is 7920 miles.

geometry  Ms. Sue, Wednesday, July 14, 2010 at 8:10pm
Study this site to learn how to do this problem.
http://www.wikihow.com/CalculatetheVolumeofaSphere 
geometry  Reiny, Wednesday, July 14, 2010 at 8:25pm
the radius would be appr. 3960 miles
so the volume would be (4/3)π(3960)^2 cubic miles