Mathematics · Time and Work
A cistern has a hole at the bottom through which water leaks. A tap can fill the cistern in 9 hours and the hole at the bottom can empty the fully filled cistern in 12 hours. If both the tap and the hole are open, then what will be the time taken to completely fill the empty cistern?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 127 hours
- 233.3 hours
- 329.9 hours
- 436 hours✓
Correct answer
36 hours
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