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A boat running upstream takes 8 hours 48...

A boat running upstream takes 8 hours 48 minutes to cover a certain distance, while it takes 4 hours to cover the same distance running downstream. What is the ratio between the speed of the boat and speed of the water current respectively ? `2:1` b. `3:2` c. `8:3` d. cannot be determined e. none of these

A

`2:1`

B

`3:1`

C

`8:3`

D

`4:3`

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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 ))
  1. A boat moves downstream at the rate of 1 km in 6 min and upstream at t...

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  2. A boat goes 40 km upstream in 8 hours and 36 km downstream in 6 hours....

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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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  5. A river is running at 2 km/hr. It took a man twice as long to row up a...

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  6. If a man goes 18/ km downstream in 4 hours and returns against the ...

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  7. A boat covers a certain distance downstream in 8 hours and comes back ...

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  8. A motorboat in still water travels at a speed of 36 km/hr. It goes ...

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

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  10. The speed of a motor-boat is that of the current of water as 36:5. The...

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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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  12. A man can row 3/4 if a km against the stream in 11 1/4 minutes and ...

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  13. Twice the speed of a boat downstream is equal to thrice the speed upst...

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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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