I keep on getting 3.2s but i don't think thats correct

When solving this problem, take down to be negative and right to be positive. A ball is thrown horizontally from the top of a building 51.2 m high. The ball strikes the ground at a point 111 m from the base of the building. The acceleration of gravity is 9.8 m/s 2 . Find the time the ball is in motion. Answer in units of s.

Guest Jan 28, 2021