Question
A boat goes 60 km upstream in 4 hours and 50 km
downstream in 2 hours, then the speed of the boat in still water isSolution
Let the speed of boat = x and the speed of the stream = y 60/(x-y) = 4 ⇒ x-y = 15 50/(x+y) = 2 ⇒ x+y = 25 From above x = 20 km/hr
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