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The speed of a boat in still water is 15 km/hr . It can go 30 km upstream and return downstream to the original point in 7 hours 12 minutes . Find the speed of a stream.

Answer» The speed of a boat in still water is 15 km/hr . It can go 30 km upstream and return downstream to the original point in 7 hours 12 minutes . Find the speed of a stream.


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