Mathematics · Time and Work
Two pipes, A and B, can fill a tank in 10 minutes and 20 minutes, respectively. Pipe C can empty the tank in 30 minutes. All three pipes are opened together at the beginning. However, pipe C is closed 2 minutes before the tank is filled. In what time (in minutes) will the tank be full?
- 16
- 28✓
- 310
- 412
Correct answer
8
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