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Question

If log103=0.477, the number of digits in 340 is.

A
18
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B
19
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C
20
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D
21
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Solution

The correct option is C 20
log103=0.477
3=100.477
340=10(0.477)×40
340=100.477×40
=1019.080=1019.1
There are 19 digits

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