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     EduGorilla 
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    A set of 7 pipes can fill 70% of a vessel in 7 minutes. Another set of 5 pipes can fill 2/5th of the vessel in 5 minutes. A third set of 10 pipes can empty 1/3rd of the tank in 10 minutes. How much time (in minutes) will it take to fill the entire tank if all the pipes are opened at the same time?

    Options :-

    1. 75/13
    2. 85/13
    3. 75/11
    4. 7
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