Question

Karan and Kundan are two brothers. Presently Karan's age is four times the age of Kundan. After 6 years Karan's age will be twice as that of Kundan. What is the present age of Kundan?

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Answer 1

Let the present age of Kundan be $x$.

So, Karan's present age is $4x$.

After 6 years,
Kundan's age = $(x+6)$
Karan's age = $(4x+6)$

Also, Karan's age would be twice of Kundan.

$\text{So, (4x +6) = 2 (x +6)}$

$\text{4x +6 = 2x +12}$

$\text{x = 3}$