Mathematics · Time and Work
Two pipes can fill a cistern individually in 100 min and 25 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 40 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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- 138 min
- 239 min
- 337 min
- 440 min✓
Correct answer
40 min
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