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Question

Given, log102=0.3010,log103=0.4771. The number of zeros after the decimal in 3100 are

A
140
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B
47
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C
12
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D
none of these
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Solution

The correct option is A 47
Let y=3100
Take log on both side on base 10,
log10y=100log103=100×.4771=47.71
Hence, number of zeros after decimal is 47.

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