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

A. 1.6020

B. 1.9030

C. 3.9030

D. None of these

Answer: Option B

Solution(By Examveda Team)

$$\eqalign{ & {\log _{10}}80 \cr & = {\log _{10}}\left( {8 \times 10} \right) \cr & = {\log _{10}}8 + {\log _{10}}10 \cr & = {\log _{10}}\left( {{2^3}} \right) + 1 \cr & = 3{\log _{10}}2 + 1 \cr & = \left( {3 \times 0.3010} \right) + 1 \cr & 1.9030 \cr} $$

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