Question
A boat covers 42 km downstream in 3 hours and 30 km upstream in 5 hours. What is the speed of the boat in still water?
Solution
ATQ, Downstream speed = 42 / 3 = 14 km/h Upstream speed = 30 / 5 = 6 km/h Speed in still water = (14 + 6) / 2 = 10 km/h
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