A boat which has a speed of 6km/h in sti...

A boat which has a speed of 6km/h in still water crosses a river of width 1 km along the shortest possible path in 20 min. the velocity of the river water in km/h is

A

5

B

4

C

3

D

1

Text Solution

Verified by Experts

The correct Answer is:

A

Speed along the shortest path
`=1/(20//60)`=3 km/hr
Speed of water ` v=sqrt(6^2-3^2)` = 5 km/hr

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