Q. The ratio of the present ages of father and son is 9 : 4. If the father is 45 years old, the son's age is
✅ Correct Answer: (B)
20 years
Explanation: One part = 45 ÷ 9 = 5. Son's age = 4 × 5 = 20 years.
Explanation by: Roshan
One part = 45 ÷ 9 = 5. Son's age = 4 × 5 = 20 years.