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     EduGorilla 
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    A chemical plant has four tanks (A, B, C and D) each containing 1000 litres of a chemical. The chemical is being pumped from one tank to another as follows: 

    From A to B @20 litres/minute                           From C [email protected] 90 litres/minute
    From A to D @ 10 litres/minute                          From C to D @ 50 litres/minute
    From B to C @ 100 litres/minute                        From D to B @ 110 litres/minute

    Which tank gets emptied first, and how long does it take (in minutes) ,) get empty after pumping starts?

    Options :-

    1. A,16.66 

    2. C,20

    3. D,20

    4. D,25

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