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Problem of the Week
Problem D
Too Far

Berenice is testing two robots that she built. She programs one robot to travel north at 24 km/h and the other to travel east at 18 km/hr. She programs the robots so that once they are 15 km apart, they will stop moving. At exactly 1 p.m., she starts both robots from the same location. If the robots work as intended, at what time will they stop moving?