Question

A catapult on a cliff launches a large round rock towards a ship on the ocean below. The rock leaves the catapult from a height H = 33.0 m above sea level, directed at an angle theta = 46.9° above the horizontal, and with a speed v = 33.7 m/s. Assuming that air friction can be neglected, calculate the horizontal distance D traveled by the projectile.....

our teacher says there are steps to this problem... i get 30.8 when i do my MaxH equation but that would mean the cliff is only 2.2m how can i find time for the whole thing