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  4. If log 10 4=0.6020, then log 10 400=

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Q. If $\log _{10} 4=0.6020$, then $\log _{10} 400=$

Logarithms

Solution:

Given, $\log _{10} 4=0.6020$
$\log _{10} 400=\log _{10} 4+2 \log _{10} 10 $
$=0.6020+2 $
$=2.6020$