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A swimmer swims from a point A against a...

A swimmer swims from a point A against a current for 5 minutes and then swims backwards in favour of the current for next 5 minutes and comes to the point B. If AB = 100 metres, the speed of the current (in km per hour) is :

A

0.4

B

0.2

C

1

D

0.6

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The correct Answer is:
D
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