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Twice the speed of a boat downstream is ...

Twice the speed of a boat downstream is equal to thrice the speed upstream. The ratio of its speed in still water to its speed in current is

A

`1:5 `

B

`1:3 `

C

`5:1 `

D

`2:3`

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The correct Answer is:
C
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S CHAND IIT JEE FOUNDATION-DISTANCE, TIME AND SPEED -Section-C (Question Bank-21(c ))
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  3. A man can row at 5 kmph in still water. If the velocity of current ...

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  4. A boat covers a distance of 14 km in 4 hours along the flow. What is t...

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  9. A steamer goes downstream from one port to another in 4 hours. It cove...

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  11. A man can row at 5 km/hr in still water . If the river is running at 1...

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  14. A boat man goes 2 km against eh current of the stream in 1 hour and...

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  15. A boat running upstream takes 8 hours 48 minutes to cover a certain...

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  16. A boatman row to a place 45 km distant and back in 20 hours. He fin...

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  17. A boat takes 90 minutes less to travel 36 miles downstream than to ...

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  18. A boat goes 24 km upstream and 28 km downstream in 6 hours. It goes 30...

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  19. At his usual rowing rate, Rahul can travel 12 miles downstream in a...

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  20. A boat takes 11 hours for travelling downstream from point A to point ...

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