Mathematics · Time and Work
Pipes A and B can fill a tank in 15 hours and 25 hours, respectively, whereas pipe C can empty the full tank in 40 hours. All three pipes are opened together, but pipe A is closed after 5 hours. After how many hours will the remaining part of the tank be filled?
- 1355 9 (or 39 4 9 )✓
- 2397 9 (or 44 1 9 )
- 3388 9 (or 43 1 9 )
- 4370 9 (or 41 1 9 )
Correct answer
355 9 (or 39 4 9 )
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