Question
A boat running downstream covers a distance of 55 km in
5 hrs and covering the same distance upstream in 11 hrs. What is the speed of a boat in still water?Solution
Downstream speed = 55/5 = 11 km/hr Upstream speed = 55/11 = 5 km/hr So speed of boat in still water = (11 + 5)/2 = 8 km/hr
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