Correct Answer - Option 4 : 84 years

**Given:**

Raju currently 18 years older than Ravi

After 6 years the ratio of their age = 15: 12

**Calculations:**

Raju is currently 18 years older than Ravi

Difference between Raju and Ravi = 18 years

After 6 years’ age ratio of Raju and Ravi = 15 ∶ 12

Ratio of age difference = 15 – 12 = 3

⇒ 3 = 18

⇒ 1 = 6

Now, Raju's age after 6 years = 15 × 6 = 90

Raju's present age = 90 – 6 = 84 years

**∴**** The present age of Raju is 84 years **