Mathematics · Pipes and Cisterns
Two pipes can fill a cistern, individually, in 40 minutes and 14 minutes, respectively. There is a pipe located at the bottom of the cistern to empty it. If all the three pipes are opened simultaneously, then the empty cistern gets filled in 20 minutes. How long will the pipe at the bottom of the tank take to empty the completely filled cistern if no other pipe is then open?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 122713 minutes
- 219713 minutes
- 321713 minutes✓
- 420713 minutes
Correct answer
21713 minutes
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