Mathematics · Pipes and Cisterns
Two pipes F1 and F2 alone can fill an empty tank in 4.5 hours and 6 hours respectively. Pipe F3 can empty the completely filled tank in 12 hours. Initially, both pipes F1 and F2 are opened together, and after 1 hour pipe F3 is also opened. In how much total time will the tank be completely filled?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 13.5 hours
- 23 hours✓
- 34 hours
- 45 hours
Correct answer
3 hours
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