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A pipe can fill a tank in 3 hours. There...

A pipe can fill a tank in 3 hours. There are two outlet pipes from the tank which can empty it in 7 and 10 hours respectively. If all the three pipes are opened simultaneously, then the tank will be filled in `8\ hou r s` b. `9\ hou r s` c. `10\ hou r s` d. `11\ hou r s`

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RS AGGARWAL-PIPES AND CISTERNS-All Questions
  1. A tank with capacity T litres is empty. If water flows into the tan...

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  2. Pipes A and B can fill a tank in 20 hours and 30 hours respectively...

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  3. A pipe can fill a tank in 3 hours. There are two outlet pipes from ...

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  4. In what time would a cistern be filled by three pipes whose diamete...

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  5. A tap can fill a tank in 6 hours. After half the tank is filled, th...

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

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

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

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

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

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

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

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

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

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

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

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  17. 12 buckets of water fill a tank when the capacity of each bucket is...

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

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

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

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