Question

Aditya's age is 50 years old and his brother is 30 years old. What is the ratio of Aditya's age to his brother age when the Aditya 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 when Aditya was 30 years old
$=\frac{30}{10}=\frac{3}{1}=3:1$
$\therefore$ The required ratio is 3:1.