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

Question: 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

Explanation:

log10 80	= log10 (8 x 10)
	= log10 8 + log10 10
	= log10 (23 ) + 1
	= 3 log10 2 + 1
	= (3 x 0.3010) + 1
	= 1.9030.