How long does it take for a Upstreman 3.2 Cu. Ft Mini Fridge with Freezer, Single Door Compact Refrigerator, Adjustable Thermostat, Energy Star, Mini Refrigerator for Dorm, Office, Bedroom, Black-BR321 to reach the ground when falling from exactly 5 miles in the air?

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.