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| Q.12 | Pipe X can fill a tank 7 times faster in comparison to pipe Y. It takes 49 minutes for pipe X and Y to fill the tank together. How much time will pipe Y alone take to fill the tank? | |
| Ans | 1. 390 minutes | |
| 2. 393 minutes | ||
| 3. 391 minutes | ||
| 4. 392 minutes |
Correct Ans Provided: 4
