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12 pumps working 6 hours a day can empty...

12 pumps working 6 hours a day can empty a completely filled reservoir in 15 days. How many such pumps working 9 hours a day will empty the same reservoir in 12 days?

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ADVANCED MATHS BY ABHINAY MATHS ENGLISH-PIPE & CISTERN -QUESTIONS
  1. Two pipes can fill a tank in 20 min and 25 min respectively due to som...

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  2. A tank has 8 pipes. Out of which some one inlet and some one outlets. ...

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  3. Out of 7 pipes. Some one inlets and some one out- lets. An inlet pipe ...

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  4. A pipe can fill a tank in 20 min and another pipe can fill a tank in 3...

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  5. Three pipes which has radius 1, 2, 3 can respectively are connected to...

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  6. Three pipes which has radius 1/2, 1, 3/2 can respec- tively are connec...

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  7. There are three taps of diameter 1 cm, 4/3 cm and 2 cm, respectively. ...

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  8. A boy and girl together fill a cistern with water. The boy pours 4 lit...

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  9. 12 pumps working 6 hours a day can empty a completely filled reservoir...

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  10. A tap takes 36 hours extra to fill a tank due to a leakage equivalent ...

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  11. A cistern has two pipes. One can will it with water in 8 hours and th...

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  12. Three taps A, B and C can fill a tank in 12, 15 and 20 hours respectiv...

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  13. Two taps A and B can fill a tank in 48 min. and 36 min. If both taps a...

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  14. Two taps A and B can fill a tank in 12 min and 16 min respectively. Bo...

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  15. Two taps A and B can fill a tank in 15 min and 25 min respectively. Bo...

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  16. Two taps A and B can fill a tank in 30 min and 36 min respectively. Bo...

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  17. Two pipes can separately fill a tank in 20 hours and 30 hours respecti...

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  18. In a tank four taps of equal efficiency are fitted on equal intervals....

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  19. Two taps A and B can fill a tank in 10 hours and 12 hours respectively...

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  20. Two taps A and B can fill a tank in 1 hours and 75 min respectively. T...

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