TS EAMCET 04 May 2019 Shift 2 Solved Paper

A boy standing on a moving truck throws a projectile such that he is able to catch it back after the truck has moved 100 m. If the truck is moving horizontally along a straight line with constant speed 30 m/s, at what speed (relative to the truck) must the projectile is thrown (Assume g = 10 m/s2)