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  1. If log10 2 = 0.3010, the value of log10 80 is:
    2. A.

    1.6020
    B.

    1.9030
    C.

    3.9030
    D.

    None of these

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    Answer : Option B

    Explanation :

    log10 80 = log10 (8 x 10)
      = log10 8 + log10 10
      = log10 (23 ) + 1
      = 3 log10 2 + 1
      = (3 x 0.3010) + 1
      = 1.9030.

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