Assuming that the air friction is responsible for up to 15% momentum or energy loss, discuss how your results have (roughly) confirm or contradict the conservation law for elastic collisions if there is no air friction. Do different mass configurations show the same physics of conservation (or non-conservation)

Two cannon balls weighing 18 kg and 24 kg are chained together and fired horizontally with a velocity of 165 m/s from the top of a 21-m wall. the chain breaks during the flight of the cannonballs and the 18-kg cannonball strikes the ground at t = 1.5 s, at a distance of 240 m from the foot of the wall, and 7 m to the right of the line of fire. determine the position of the other cannonball at that instant. neglect the resistance of the air.