Question:
After 12 years, Kanwar shall be 3 times as old as he was 4 years ago. Find his present age.
Solution:
Let Kanwar's present age be $x$ yr.
After 12.yr, Kanwar's age $=(x+12)$ y
and 4 yr ago, Kanwar's age $=(x-4)$ yr
According to the question,
$x+12=3(x-4) \Rightarrow x+12=3 x-12$
$\Rightarrow \quad 3 x-x=12+12 \Rightarrow 2 x=24$
$\Rightarrow$ $x=\frac{24}{2}$
$\therefore \quad x=12$
Hence, Kanwar's present age is $12 \mathrm{yr}$.
Click here to get exam-ready with eSaral
For making your preparation journey smoother of JEE, NEET and Class 8 to 10, grab our app now.