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Question
Pipes P and Q can fill a tank in 5 and 6 h respectively. Pipe R can empty it in 12 h. If all the three pipes are opened together, then the tank will be filled in :
Options
`4 5/13` h
`1 9/17` h
`3 5/13` h
`3 9/17` h
MCQ
Solution
`3 9/17` h
Explanation:
Net part fill in 1 h`[1/5+1/6-1/12]=17/60`
⇒ The tank will be full in `60/17 h i.e. 3 9/17h`
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Time and Work (Entrance Exam)
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