SSC JE Mechanical Engineering 11 Oct 2020 Shift 1 Papers

Given, Johnson's current age is 1/5 of his father's age.
Let Johnson's present age be x
⇒ Johnson's father's present age = 5x
Given, five years earlier, Johnson's father's age was 2 years more than 8 times Johnson's age.
Johnson's age five years earlier = x - 5
Johnson's father's age five years earlier = 5x - 5
5x - 5 = 8 (x - 5) + 2
5x - 5 = 8x - 40 + 2
8x - 5x = 40 - 5 - 2
3x = 33
x = 11
Hence, Johnson's present age = x = 11 years.
Johnson's father's present age = 5x = 5 × 11 = 55 years.
Hence, the correct answer is "11, 55".