Mathematics · Time and Work
A cistern has two inlets I1 and I2 which can fill it in 16 hours and 20 hours, respectively. An outlet can empty the full cistern in 12 hours. If all three pipes are opened together in the empty cistern, how much time (in hours) will they take to fill the cistern completely?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 13367 hours
- 23656 hours
- 33427 hours✓
- 42407 hours
Correct answer
3427 hours
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