A man can swim at the rate of 6 km/hr in still water. A river 1 km wide flows at the rate of 3 km/hr. The displacement of the man in reaching the opposite bank of river, when crosses the river in shortest time is
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Answer:
11.54min
Explanation:
speed in the direction of AB
= √6²-3² = √27km/h
Now,
shortest time = AB/√27km/h
= 1km/√27km/h
= 0.19245h
= 0.19245x60min = 11.54min
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