Given: Sum of the present ages of Abhi and his son = 50 years Calculation: 5 years ago sum of ages of Abhi and his son = 50 – 10 = 40 years Let 5 years ago age of his son be x years 5 years ago age of Abhi = 7x According to the question 7x + x = 40 ⇒ 8x = 40 ⇒ x = 40/8 ⇒ x = 5 5 years ago age of Abhi = 5 × 7 = 35 years Present age of Abhi = 35 + 5 = 40 years ∴ Age of Abhi after 5 years = 40 + 5 = 45 years