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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

`(x+y)km//h`

B

`(x-y)km//h`

C

`xykm//h`

D

`(x)/(y)km//h`

Text Solution

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The correct Answer is:
A
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Knowledge Check

  • A motor boat takes 12 hours to go downstream and it takes 24 hours to return the same distance. What is the time taken by boat in still water?

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    C
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