If \[0.42\times {{100}^{k}}=42,\]then the value of k is [SSC (CPO) 2012] |
A) 4
B) 2
C) 1
D) 3
Correct Answer: C
Solution :
Given, \[0.42\times {{100}^{k}}=42\] |
\[\Rightarrow \]\[\frac{42}{100}\times {{100}^{k}}=42\] |
\[\Rightarrow \]\[{{100}^{k}}=\frac{42\times 100}{42}={{100}^{1}}\] |
On comparing both sides, we get |
\[k=1\] |
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