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A river is flowing from west to east at ...

A river is flowing from west to east at a speed of 5 m/min. A man on the south bank of the river, capable of swimming at 10 m/min in still water, wants to swim across the river in the shortest time. He should swim in a direction.

A

`tan^-1 (2) E of N`

B

`tan^-1 (2) N of E`

C

`30^@ E of N`

D

`60^@ E of N`

Text Solution

Verified by Experts

The correct Answer is:
B
(b) Finally, he will swim along `B`.
`tan theta = (v)/(u) = (10)/(5) = 2`
`rArr theta = tan^-1 (2) N of E`
.
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