Question
A boat running downstream covers a distance of 36 km in
6 hrs and covering the same distance upstream in 9 hrs. What is the speed of a boat in still water?Solution
Downstream speed = 36/6 = 6 km/hr Upstream speed = 36/9 = 4 km/hr So speed of boat in still water = (6 + 4)/2 = 5 km/hr
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