Question

define volume of sphere for

Answer 1

volume of sphere is ..4/3pier^3

Answer 2

a sphere is actually divided into several pyramids.
let the no of pyramids be=n
volume of i pyramid=1/3*b*h
vertex of n pyramids=center; height of pyramid=radius
therefore vol.of pyramid=1/3*b*r
vol of n pyramid=1/3*b1*r+.......1/3*bn*r
volume n pyramids = volume of sphere
=4/3*pi*r*r*r