Mathematics · Time and Work
Two pipes can fill a cistern individually in 99 min and 90 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 50 min. How long will the pipe at the bottom take to empty the completely filled cistern if no other pipe is open?
- 1825 min✓
- 2815 min
- 3822 min
- 4841 min
Correct answer
825 min
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