Question

(a) 1
5
(0)
0.
11
Q.11 Aman can swim with velocity v relative to water. He has 1
cross a river of width d flowing with a velocity u (u > v
The distance through which he is carried down stream t
the river is r. Which of the following statements is correct
(a) If he crosses the river in minimum time x=44
du
(b) x cannot be less than au
(c) For x to be minimum he has to swim in a direction makin
an angle of 2 - sin " ) with the direction of tt
flow of water.
(d) x will be maximum if he swims in a direction makin
an angle of +sin") with direction of the flowe
water.​

Answer 1

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