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Q.

If $\log_{10} 3 = 0 .4771$ , then the number of digits in 3⁴⁰ is

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answer is 20.

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Detailed Solution

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$40 \log 3 = 40 (0 .4771) = 19 .084 \Rightarrow n - 1 = 19 \Rightarrow n = 20$

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If log10⁡3=0.4771, then the number of digits in 340 is