Mathematics · Pipes and Cisterns
Two pipes, A and B, can fill a tank in 12 minutes and 18 minutes respectively. A third pipe, C, can empty the tank in 9 minutes. Pipes A and B are opened together for 4 minutes, then closed. After that, pipe C is opened alone for 2 minutes, then closed. Finally, all three pipes (A, B, and C) are opened together. How much total time (in minutes) will it take to fill the tank completely from the start?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 120 minutes
- 225 minutes
- 340 minutes
- 430 minutes✓
Correct answer
30 minutes
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