15 cm is the height of water in a cylindrical container of radius r. What is the height of this quantity of water if it is poured into a cylindrical container of radius 2r?
V=πr2H
V=15πr2 orginal
V=Hπ(2r)2 new
15πr2=hπ4r2
15=4h
15/4=h of new
