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A boat running downstream covers a distance of 36 km in 4 hrs and for covering the same distance upstream it takes 9 hrs. What is the speed of the stream?
Downstream speed = 36/4 = 9 km/hr
Upstream speed = 36/9 = 4 km/hr
So, speed of stream = 1/2*(9-4)=2.5 km/hr
By: Amit Kumar ProfileResourcesReport error
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