2010 · Q9
The ratio between the ages of A and B is 2 : 5. After 8 years, their ages will be in the ratio 1:2. What is the difference between their present ages?
Elementary MathematicsRatio and Proportion
- A20 years
- B22 years
- C24 years
- D25 years
Explanation
(2k+8)/(5k+8)=1/2 gives k=8; ages 16 and 40, difference 24.