Question
A boat covers 180 km downstream in 5 hours. If the speed
of the boat in upstream is one-third of its downstream speed, then how much time will it take to travel 144 km upstream?Solution
ATQ,
Downstream speed of the boat = 180 / 5 = 36 km/h
Therefore, upstream speed of the boat = 36 / 3 = 12 km/h
Required time taken = 144 / 12 = 12 hours
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