The sum of the ages of A and B is 46 years. Five years ago, the ratio of their ages was 4:5. What is B's current age?
Show answer & explanation
Correct answer: D
Explanation
A + B = 46
Ratio 5 years ago = 4 : 5
Let the ages 5 years ago be 4x and 5x.
Current ages = (4x + 5) and (5x + 5)
(4x + 5) + (5x + 5) = 46
9x + 10 = 46
9x = 36
x = 4
B's current age = 5x + 5 = 20 + 5 = 25 years