A right circular cone of diameter r cm and height 12cm rests on the base of a right circular cylinder of radius r cm. Their bases are in the same plane and the cylinder is filled with water upto a height of 12cm. If the cone is then removed, find the to which the water level will fall.
adius of base of cone=r/2
radius of base ofcylinder=r
height of cone=12cm
h of water before cone ws tkn out=12cm
thus, vol of water left in cylinder aftr cone is tken out=vol of water - vol of cone
=pi x r^2 x 12 - 1/3x pi x(r/2)^2 x 12
=pi x r^2x11
u cn observe that 11 is present height (or "h") of the water(refer cylinder 's volume formula)