Mathematics · Pipes and Cisterns
Two pipes can fill up a tank in 30 minutes and 40 minutes respectively, and another pipe can empty the full tank in 20 minutes. If all the pipes are opened when the tank is half full, then the time required to fill the tank completely will be:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 11 hour
- 22 hours
- 33 hours✓
- 42 hours & 30 minutes
Correct answer
3 hours
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