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A sailor in river takes a boat from plac...

A sailor in river takes a boat from place A to place B, and returns to A. place A and B are 21 km apart. And he takes 10 hours to go and return. The time taken by the boat to row 7 km downstream is equal to the time taken by the boat to row 3 km upstream. Then what is the speed of the current?

A

5 km/h

B

2 km/h

C

7 km/h

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
A
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