Question

The average age of children in Class $VII$ is $12yearsand3months$. Express this age in seconds.

Answer 1

Step 1: Convert into days

Given, $12years3months$

We know that,

$1year=365days$ and $1month=30days$

So,

$$\begin{gathered} 12years=12\times 365=4380days \\ 3months=3\times 30=90days \end{gathered}$$

Adding together we get,

$\begin{array}{rcl}12years3months& =& 4380+90\\ & =& 4470days\end{array}$

Step 2: Convert into seconds

We also know that,

$\begin{array}{rcl}1day& =& 24hr\\ 1hr& =& 60min\\ 1min& =& 60sec\end{array}$

So,

$\begin{array}{rcl}4470days& =& \left(4470\times 24\times 60\times 60\right)sec\\ & =& 386208000sec\end{array}$

Hence, $12years3months=386208000sec$