The present age of Mr. Sanyal is three times the age of his son. Six years hence, the ratio of their ages will be 5 : 2. What is the present age of Mr. Sanyal?
Note
Let the son's age be x years.
Then, Mr. Sanyal's age = 3x years.
2 (3x + 6) = 5 (x + 6)
⇒ 6x + 12 = 5x + 30
⇒ x = 18.
∴ Present age of Mr. Sanyal = 3x years = (3 × 18) years = 54 years.