Question

Kirti got married 6 years ago. Today her age is $1\frac{1}{4}$ times her age at the time of marriage. Her son's age is (1/10) times her age. Her son's age is _______.

• A. $2$ years
• B. $3$ years
• C. $4$ years
• D. $5$ years

Answer 1

The correct option is B $3$ years

Let the age of Kirti before 6 years ago is $x$. Then today her age is $x+6$ or $1\frac{1}{4}$times her age i.e., $\frac{5}{4}x$. So equating the age of Kirti, we get

$x+6=\frac{5x}{4}⟹x=24$ Now age of Kirti is $24+6=30years$

So, age if her son is $\frac{30}{10}=3years$