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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

1

B

3

C

4

D

`sqrt41`

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SL ARORA-Motion in a Plane-Excercise
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