Question

After $18$ years, Swarnim will be $4$ times as old as he is now. His present age is _________.

Answer 1

Let's find Swarm's present age :

According the given data

Let us assume swarnim’s parent age be $s$ year.

Then, after $18$ year, Swarnim’s age = $\left(s+18\right)$ year

According to the question,

$$\begin{gathered} s+18=4s \\ s-4s=-18 \\ -3s=-18 \\ \frac{-3s}{3}=\left[\frac{-18}{3}\right] \\ s=6 \end{gathered}$$

Therefore, swarnim’s present age is $6$ years