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Ratio of upstream and downstream speed o...

Ratio of upstream and downstream speed of a boat (A) is 7:11 and boat cover 70 km upstream in 5 hours. Boat (B) takes 10 hours' to cover 120 km in upstream: (speed of stream:is same for both boat)
Find total time taken by boat B to cover 80 km in downstream & same distance in upstream?

A

A)`10(2)/(3)` hours

B

B)`12(2)/(3)` hours

C

C)`8(2)/(3)` hours

D

D)`10(1)/(3)` hours

Text Solution

Verified by Experts

The correct Answer is:
A
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ADDA247-BOAT AND STREAM -Prelims Questions (Level-2)
  1. Time taken by boat to cover D km in upstream is 4 hours more than the ...

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  2. Speed of boat in downstream is twice the speed of boat in upstream, if...

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  3. Ratio of upstream and downstream speed of a boat (A) is 7:11 and boat ...

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  4. If speed of boat C in still water is 25% more than that of speed of bo...

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  5. A boat which takes 6 hr to travel 105 km in still water, goes 364 km i...

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  6. The speed of a boat in still water is 15 kmph rate of current is 3 kmp...

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  7. Time taken by a boat to cover (D-11) km in upstream is 5 times of the ...

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  8. The ratio of speed of boat in still water to speed of stream is 11: 1....

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  9. A boat cover 11.2 km distance in downstream in 48 minutes. If ratio be...

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  10. A Boat is moving in downstream and speed of Boat in still water is 5 t...

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  11. Ratio of time taken to cover (A +5} km in downstream to that of time t...

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  12. Read the given information carefully and answer the following question...

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  13. Read the given information carefully and answer the following question...

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  14. Read the given information carefully and answer the following question...

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  15. Read the given information carefully and answer the following question...

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  16. Read the given information carefully and answer the following question...

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  17. Speed of a boat in still water is 20 km/hr and speed of current 'is 4 ...

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  18. In a River there are two boats A and B, where boat A covers 240 km in ...

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  19. Two banks are located on a river and are 28 km apart: Leaving one of t...

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  20. A boat covers (D + 80) km in downstream and 'D' km upstream in total ...

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