Question
A motor boat goes downstream from point A to B ,which is 36 km away from point A, and then returns to
A motor boat goes downstream from point A to B ,which is 36 km away from point A, and then returns to
A. If actual speed of the boat in still water is 7 km/hour , and the total upstream and downstream journey takes 21 hours .What must be the actual speed of boat for the journey from A to B to take exactly 108 minutes?
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