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     EduGorilla 
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    Two pipes A and B, when working singly, can fill a tank in 36 minutes and 45 minutes respectively. A waste pipe, C, can empty the tank in 30 minutes. First A and B are opened. After 7 minutes, C is also opened. How many minutes will it take to fill the tank?

    Options :-

    1. 60
    2. 39
    3. 42
    4. 45
    5. 51
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Reply To: Two pipes A and B, when working singly, can fill a tank in 36 minutes and 45 minutes respectively. A….
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