Question

Aditya's age is 50 years old and his brother is 30 years old. What is the ratio of their ages when Aditya's age was 30 years old?

• A. 4: 11
• B. 1:3
• C. 3:1
• D. 4:5

Answer 1

The correct option is C

3:1

Given: Aditya's present age = 50 years
Brother's present age = 30 years
Aditya was 30 years old, 20 years ago. [$\because$ (50 - 20) years = 30 years]
$\therefore$ His brother was 30 - 20 = 10 years old, 20 years ago.
Now, the ratio of Aditya's age to his brother's age = $\frac{30}{10}=\frac{3}{1}=3:1$
$\therefore$ The required ratio is 3:1.