Question

The ratio between the present ages of A and B is 5:3 respectively. The ratio between A's age 4 years ago and B's age 4 years hence is 1:1. What is the ratio between A's age 4 years hence and B's age 4 years ago?

• A. 1:3
• B. 3:1
• C. 4:1
• D. 1:4

Answer 1

The correct option is B

3:1

Let the present ages of A and B be 5x and 3x years respectively.

Then, $\frac{5x-4}{3x+4}=1$

$\Rightarrow x=4$

$\therefore$ Required ratio = (5x+4) : (3x - 4) = 24:8 = 3:1