A Cylinder has base of radius 7cm ...height 15cm.....it is a regular cylinder....

1.water is filled upto height of 10cm of this cylinder , find the volume of water...

Answer : v= 22/7 x 7 x 7 x 10

: volume of water=1540ml.

2.When 18 small spheres are put into this cylinder the water level rises up as "h"cm....Prove That h = 24a3(3=Cube) / 49

Answer : ?

please help me find the answer for the 2nd question guys ...thanks .