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| Q.9 | Pipes A and B can fill a tank in 6 hours and 8 hours, respectively while pipe C alone can empty the full tank in 12 hours. A and B are opened together for 2 hours and then C is also opened. The total time (in hours) taken to fill the tank completely is: | |
| Ans | 1. 5 | |
| 2. 6 | ||
| 3. 7 | ||
| 4. 4 |
Correct Ans Provided: 4
