A golfer rips a tee shot from an elevated driving range tee-off such that the ball leaves horizontally. The ball lands exactly at the 75.0 meter marker, and was shot from the upper level (6.0 meters above the ground). How long was the ball in the air?
It fell 6 meters. The rest is irrelevant.
6 = 4.9 t^2
t = 1.11 seconds