A different aquarium should contain 15,000 liters of water when filled correctly. It will overflow if'it gets to 17,600 liters. One day there is an accident and the tank cracles in 4 places. Water flows out of each crack at a rate of 1/2 liter per hour. An emergency pump can re-fill the tank at a rate of 2 liters per minute. How many minutes must the pump run to replace the water lost each hour? Explain your answer W th th