Mathematics · Time and Work
Two pumps, M and N, can fill a tank in 36 hours and 45 hours, respectively. Another pump P can empty the tank in 30 hours. First, M and N are opened, and after 8 hours, P is also opened. The tank will be filled up in a total of T hours. The value of T is:
- 132
- 240
- 344✓
- 436
Correct answer
44
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