Question
A boat running downstream covers a distance of 30 km in
2 hrs and covering the same distance upstream in 10 hrs. What is the speed of a boat in still water?Solution
Downstream speed = 30/2 = 15 km/hr Upstream speed = 30/10 = 3 km/hr So speed of boat in still water = (15 + 3)/2 = 9 km/hr
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