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Q.

The velocity of a boat in still water is 5 m/s. If water flows in the river with a velocity of 3 m/s what is the difference in times taken to cross the river in the shortest path and the shortest time. The width of the river is 100 m.

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a

1s

b

10s

c

32s

d

5s

answer is D.

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Detailed Solution

t=ts.p−ts.t =10025−9−1005 =1004−1005 = 25 – 20 = 5 sec

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The velocity of a boat in still water is 5 m/s. If water flows in the river with a velocity of 3 m/s what is the difference in times taken to cross the river in the shortest path and the shortest time. The width of the river is 100 m.