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Q.

If $\log 27 = 1.431$ , the value of $\log 9$ is

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a

0.654

b

0.754

c

0.954

d

0.854

answer is C.

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Detailed Solution

\log 27 = 1.431

$\Rightarrow \log 3^{3} = 1.431$

$\Rightarrow 3 \log 3 = 1.431$

$\Rightarrow \log 3 = 0.477$

$\Rightarrow \log 9 = 2 \log 3$

$= 2 \times 0.477$

$= 0.954$

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If log27=1.431 , the value of log9 is