A ball is dropped from the top of a 51.0 -high cliff. At the same time, a carefully aimed stone is thrown straight up from the bottom of the cliff...

A ball is dropped from the top of a 51.0 -high cliff. At the same time, a carefully aimed stone is thrown straight up from the bottom of the cliff with a speed of 27.0 . The stone and ball collide part way up.How far above the base of the cliff does this happen?