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Q. 30. A motor boat whose speed in still water is 16 km/hr, takes 2 hours more to go 60 km upstream than to return to the same spot. Find the speed of the stream. 6

Sol. Let the speed of the stream = x km/hr
Then the speed of motor boat going upstream = (16 – x) km/hr
and the speed of motor boat going downstream = (16 + x) km/hr
According to the question

Mathematics 2009 Question Papers Class X
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