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Pipes and Cisterns - Data Intensity 1 :: Discussion
| 12. | Three taps A, B and C can fill a tank in 12, 15 and 20 hours respectively. If A is open all the time and B and C are open for one hour each alternately, the tank will be full is____? | |
| A. | 6 hrs | |
| B. | 6 2/3 hrs | |
| C. | 7 hrs | |
| D. | 7 1/2 hrs | |
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