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Discussion :: Environmental Engineering - Civil Engineering

  1. The percentage of filtered water, which is used for backwashing in rapid sand filters, is about

    2. A.

     0.2 to 0.4
    B.

     0.4 to 1.0
    C.

     2 to 4
    D.

     5 to 7

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    Answer : Option C

    Explanation :

    Explanation Not Provided

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