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     EduGorilla 
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    A pipe can fill a cistern in 8 minutes and another pipe in 12 minutes, but a third pipe can empty it in 6 minutes. The first two pipes are kept open for 3 minutes in the beginning and then the third pipe is also opened. In what more time is the cistern filled?

    Options :-

    1. 11 min
    2. 8 ½ min
    3. 9 min
    4. 12 min
    5. 10 min
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Reply To: A pipe can fill a cistern in 8 minutes and another pipe in 12 minutes, but a third pipe can empty it….
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