Question
A boat running downstream covers a distance of 39 km in
3 hrs and covering the same distance upstream in 13 hrs. What is the speed of a boat in still water?Solution
Downstream speed = 39/3 = 13 km/hr Upstream speed = 39/13 = 3 km/hr So speed of boat in still water = (13 + 3)/2 = 8 km/hr
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