Question

Express the following as $cm$ using decimals.

$162mm$

Answer 1

As we know that

$$\begin{gathered} 1cm=10mm \\ 1mm=\frac{1}{10}cm \end{gathered}$$

So,

$\begin{array}{rcl}162mm& =& 162\times \frac{1}{10}cm\\ & =& \frac{162}{10}cm\\ & =& 16.2cm\end{array}$

Hence the answer is $16.2cm$