Mathematics · Time and Work
Two pipes can fill a cistern individually in 35 min and 15 min, respectively. There is an emptying pipe located at the bottom of the cistern. If all three pipes are opened simultaneously, the empty cistern gets filled in 42 min. How long will the pipe at the bottom take to empty the completely filled cistern by itself?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 114 min✓
- 211 min
- 38 min
- 45 min
Correct answer
14 min
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