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Pipes and Cisterns - Data Intensity 1 :: Discussion
| 50. | Two pipes P and Q can fill a cistern in 12 and 15 minutes respectively. Both are opened together, but at the end of 3 minutes the first is turned off. How much longer will the cistern take to fill? | |
| A. | 9 1/4 min | |
| B. | 11 1/4 min | |
| C. | 7 1/4 min | |
| D. | 8 1/2 min | |
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