Two person start walking in opposite direction at 5 km/hr and 4 km/hr respectively after how many hours will they be 45 km apart
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Two persons start walking in opposite direction at 5km and 4km per hour respectively.
In one hour the distance between them is 9 km as given in the question.
So to be 45 km apart the time they take will be 45/9 = 5 hours.
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