Mathematics · Pipes and Cisterns
A cistern can be filled separately by two pipes A and B in 36 minutes and 45 minutes, respectively. A waste pipe C at the bottom can empty the full cistern in 30 minutes. If pipe C is opened 7 minutes after pipes A and B are opened, in how many total minutes from the beginning does the cistern become full?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 148 minutes
- 244 minutes
- 346 minutes✓
- 442 minutes
Correct answer
46 minutes
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