Question

Question 78

After 20 years, Manoj will be 5 times as old as he is now. Find his present age.

Answer 1

Let the present age of Manoj be x years.
Then, Manoj's age after 20 yr = (x + 20) years
It is given that after 20 years, Manoj's age will be 5 times his present age.
Therefore, the equation is
x + 20 = 5x
$\Rightarrow 20=5x-x\left[transposingxtoRHS\right]\Rightarrow \frac{20}{4}=\frac{4x}{4}\left[dividingbothsidesby4\right]\Rightarrow 5=x$
Hence, the present age of Manoj is 5 years.