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Eight pipes are fitted to a water tank. ...

Eight pipes are fitted to a water tank. Some of these are water pipes to fill the tank and the remaining are waste pipes used to empty the tank. Each water pipe can fill the tank in 12 hours and eat waste pipe can empty it in 36 hours. On opening all the pipes an empty tank is filled in 3 hours. The number of waste pipes is `2` b. `3` c. `4` d. `5`

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RS AGGARWAL-PIPES AND CISTERNS-All Questions
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  2. Two pipes A and B can separately fill a cistern in 60 minutes and 7...

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

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

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

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

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

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

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

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

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  11. 12 buckets of water fill a tank when the capacity of each bucket is...

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

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

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

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

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

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

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  18. Four pipes can fill a reservoir in 15, 20, 30 and 60 hours respecti...

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  19. Two pipes can fill a tank with tank with water in 15 and 12 hours r...

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  20. Tap a fill a tank in 4 hours whereas tap B empties the full tank in...

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