a conical vessel of radius 6 cm and height 8 cm is is completely filled with water. a sphere is lowered into water such that when it touches the sides, it is just immersed. what fraction of water overflows? ( this is the 8th questionof 2015 CBSE Sample Paper for Mathematics - section D. sorry, because i cannot upload the figure given. i think we hve to use therems form Circles chapter also in this question.)