The ratio of the ages of A and B is 4:5. After 6 years, the ratio becomes 5:6. What is A's present age?
Show answer & explanation
Correct answer: C
Explanation
Given:
A : B = 4 : 5
A = 4x, B = 5x
After 6 years
(4x + 6) : (5x + 6) = 5 : 6
6(4x + 6) = 5(5x + 6)
24x + 36 = 25x + 30
x = 6
A = 4x = 4 × 6 = 24
A's present age = 24 years