Question

The present age of Rakesh is three times his age ten years ago. What was his age ten years ago?

• A. 15
• B. 10
• C. 5
• D. 20

Answer 1

The correct option is C 5

$\text{Let the present of Rakesh be x years.}$
$\text{Ten years ago, his age was (x-10) years.}$

According to the question,
$x=3\times (x-10)\Rightarrow x=3x-30\Rightarrow 3x-x=30\Rightarrow 2x=30\Rightarrow x=\frac{30}{2}\Rightarrow x=15$

$\text{Hence, ten years ago Rakesh's age was}\text{x -10 = 15 -10 = 5 years.}$