Mathematics · Time and Work
Two pipes can fill a cistern individually in 44 min and 84 min, respectively. There is a waste pipe located at the bottom of the cistern to empty it. If all three pipes are opened simultaneously, the empty cistern gets filled in 28 min. How long will the pipe at the bottom take to empty the completely filled cistern if no other pipe is open?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1921 min
- 2916 min
- 3920 min
- 4924 min✓
Correct answer
924 min
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