A ball is thrown upward. What is the maximum height (h) reached by the ball?

A ball is thrown upward. At a height of 10 meters above the ground, the ball has a potential energy of 50 Joules (with the potential energy equal to zero at ground level) and is moving upward with a kinetic energy of 50 Joules. What is the maximum height (h) reached by the ball? Consider air friction to be negligible.