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Narendra starts journey on boat. When wi...

Narendra starts journey on boat. When wind flows his cap falls and start floating downstream in opposite direction of boat. (before Narendra find out). Boat continuously going upstream for 12 min. and comes in downstream. When cap reaches starting point, Narendra catches it. If cap of Marendra has fall 3 km. away from strating point, find speed of river flow ?

A

5 km./hr.

B

6 km./hr.

C

7.5 km./hr.

D

Cannot be calculated

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The correct Answer is:
C
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