Question
A boat covers 48 km downstream in 3 hours and 40 km
upstream in 4 hours. What is the speed of the boat in still water?Solution
Downstream speed = 48 / 3 = 16 km/h Upstream speed = 40 / 4 = 10 km/h Speed of boat in still water = (16 + 10) / 2 = 26 / 2 = 13 km/h Hence, the correct answer is 13 km/h.
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