Sunil is 3 years older than Kavya, and Kavya is twice as old as Arnav. The three ages add up to 43 years. How old is Sunil?

Explanation

1. 01

   Let Arnav be $a$. Kavya = $2a$, Sunil = $2a + 3$.

2. 02

   $a + 2a + 2a + 3 = 43$, so $5a = 40$ and $a = 8$.

3. 03

   Sunil = $2 \times 8 + 3 = 19$ years.