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A cistern has two pipes. One can till it...

A cistern has two pipes. One can till it with water in 8 hours and other can empty it in 5 hours. In how many hours will the cistern be emptied if both the pipes are opened together when `3/4` of the cistern is already full of water? `3 1/3hou r s` b. `6\ hou r s` c. `10\ hou r s` d. `\ 13 1/3hou r s`

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RS AGGARWAL-PIPES AND CISTERNS-All Questions
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  2. A tap can fill a tank in 6 hours. After half the tank is filled, th...

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  3. A cistern has two pipes. One can till it with water in 8 hours and ...

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  4. A vessel has three pipes connected to it two to supply liquid and o...

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  5. Two pipes A and B can separately fill a cistern in 60 minutes and 7...

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  6. Eight pipes are fitted to a water tank. Some of these are water pip...

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  7. A pump can fill a tank in 2 hours. Due to a leak in the tank it takes ...

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  8. Two taps A and B can fill a tank in 5 hours and 20 hours respective...

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  9. Three pipes A, B and C can fill a tank from empty to full in 30 min...

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  10. Two pipes A and B together can fill a cistern in 4 hours. Had they ...

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  11. One pipe can fill a tank three times as fast as another pipe. If toget...

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  12. A tank is filled in 5 hours by three pipes A, B and C. The pipe C i...

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  13. A swimming pool is filled by three pipes with uniform flow. The firs...

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  14. 12 buckets of water fill a tank when the capacity of each bucket is...

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  15. Bucket P has thrice the capacity as bucket Q. It takes 60 turns for...

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  16. Two pipes AS and B can fill a tank in 15 minutes and 20 minutes res...

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  17. A large tanker can he filled by two pipes A and B in 60 minutes and...

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  18. Two pipes A and B can fill a tank in 15 hours and 20 hours respectiv...

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  19. Two pipes A and B can fill a cistern in 12 minutes and 13 ininu4s r...

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  20. Two pipes A and B can fill a tank in 20 and 30 hours respectively. ...

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