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A boy can cover double distance when swi...

A boy can cover double distance when swimming with the stream in a definite time period than against the stream. If speed of stream is 3 km./hr., what will be speed of boy in still water-

A

6 km./hr.

B

9 km./hr.

C

10 km./hr.

D

12 km./hr.

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The correct Answer is:
B
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  7. Speed of Boat in still water is 50% more than speed of stream. Boat co...

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  9. A boat takes half time in moving a certain distance downstream than up...

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  10. A boat goes 4 km upstream and 4 km downstream in 1 hour. The same boat...

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  11. A boat goes 2 km upstream and 3 km downstream in 20 minutes. It goes 7...

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  13. The distance between A & B is 211 km. One boat starts moving from poin...

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  14. A boat goes 6 km an hour in still water, but takes thrice as much time...

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  15. A boat takes 60% more time to cover a certain distance in upstream tha...

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  16. A man covers 39 km upstream an 116 km downstream in 7 hrs. He also cov...

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  17. A motorboat goes from A to B and comes back located at bank of river. ...

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