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| Q.6 | An inlet pipe can fill a tank in 20 hours. An outlet pipe can drain the tank in 30 hours. If a system of “n” pipes (fill pipes and drain pipes combined) can fill the tank in exactly 5 hours, which of the following is a possible value of n? | |
| Ans | 1. 33 | |
| 2. 28 | ||
| 3. 54 | ||
| 4. 51 |
Correct Ans Provided: 3
