Mathematics · Pipes and Cisterns
Two pipes can fill a tank in 4 hours and 24 hours, respectively. A third pipe can empty the tank in 6 hours. If all three pipes are opened together, how long (in hours) will it take to fill half of the empty tank?
- 12 hours
- 24 hours
- 36 hours
- 43 hours✓
Correct answer
3 hours
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