Question
The speed of a boat in still water is 8 km/hr and speed
of current is 3 km/hr. If time taken to cover a certain distance upstream is 11 hours, then how long will the boat take to cover the same distance downstream?Solution
Total distance = 11 × (8 – 3) = 55 km Required time = 55/(8 + 3) = 55/11 = 5 hrs
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