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A man covers 39 km upstream an 116 km do...

A man covers 39 km upstream an 116 km downstream in 7 hrs. He also covers 65 km upstream and 87 km downstream in 8 hrs. Find the speed of boat in still water.

A

21 km/hr

B

27 km/hr

C

18 km/hr

D

29 km/hr

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The correct Answer is:
A
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