Question
 A boat travels 27 km upstream in 3 hours and 45 km
downstream in 3 hours. What is the speed of the boat in still water?Solution
ATQ, Upstream speed = 27/3 = 9 km/h Downstream speed = 45/3 = 15 km/h Speed in still water = (15 + 9)/2 = 12 km/h
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