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     EduGorilla 
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    Pipes A, B and C are attached to a cuboidal pool which empty it at the rate of 12 litres / hour, 15 litres / hour and 25 litres / hour, respectively. The length, breadth and height of the pool are in the ratio of 7: 2: 1 respectively. The sum of the length, breadth and height is 40m. If pipe A and B are open in the 1st hour and pipe B and C are open in the 2nd hour and this pattern continues, then how long will it take to completely empty (1/500)th of the pool? [Round off to the nearest decimal]

    Options :-

    1. 55 hours
    2. 54 hours
    3. 56 hours
    4. 50 hours
    5. 53 hours
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