Multiple choice

The age of the father is four times the age of the son. In 20 years his age will be only twice the age of his son? What are the ages of the father and the son respectively?

  1. 40 years, 10 years

  2. 36 years, 9 years

  3. 44 years, 11 years

  4. 60 years, 15 years
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Let son's age = s, then father's age = 4s. In 20 years: (4s + 20) = 2(s + 20). Solving: 4s + 20 = 2s + 40, so 2s = 20, s = 10. Father is 40. Check: in 20 years, father 60, son 30, ratio is 2:1.

Keep practicing — related questions