Two buses start out from the same terminal at the same time and travel in the same direction the first bus travels at the rate of 80 kph while the second bus travels at 70 kph. In how many hours will the distance covered by the 1st bus be 50 km more than the distance covered by the second bus?
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After 5 hours distance covered by A will be 350 km and distance covered by B will be 400 km so difference will be 50 km