WBCS.LIVE practice question

Age of father 10 years ago was three times the age of his son. After 10 years, father’s age is twice that of his son. The ratio of their present age is

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. 7 : 3
  2. 9 : 5
  3. 7 : 4
  4. 11 : 7

Correct answer and explanation

Correct answer: 7 : 3

Explanation: ✅ Correct Answer: A) 7 : 3 📚 Explanation: Let ages 10 years ago be 3x and x. In 10 years (20 years from then), ages are 3x + 20 and x + 20. Given (3x + 20) = 2(x + 20), solving gives x = 20. Present ages are 3(20)+10 = 70 and 20+10 = 30. The ratio is 7 : 3.