Question

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​

Answer 1

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