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Two pipes can fill a tank in 12 hours an...

Two pipes can fill a tank in 12 hours and 16 hours respectively. A third pipe can empty the tank in 30 hours. If all the three pipes are opened and function simultaneously they in how much time the tank will be full? (in hours) `10 4/9` b. `9 1/2` c. `8 8/9` d. `7 2/9`

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RS AGGARWAL-PIPES AND CISTERNS-All Questions
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  14. Water flows through a cylindrical pipe of internal diameter 7 cm at...

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  15. An outlet pipe can empty a cistern in 3 hours. In what time will th...

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  16. Two pipes A and B can fill a tank in 24h and 30 h respectively. If ...

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  17. A tank is 7 metre long and 4 metre wide. At what and speed should w...

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  18. Two pieces A and B can fill a tank in 18 hrs and 6 hrs respectively...

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  19. Two pipes can fill a tank in 12 hours and 16 hours respectively. A ...

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  20. a tank has two outlets A and B, which together take 6h to empty a f...

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