Five years ago, the ratio of the ages of A and B was 3 : 4. Five years from now,the ratio of their ages will be 4 : 5. What is the ratio of A and B, 10 years from now?
Answer & explanation
Correct answer: option 1
Ratio of age 5 years ago,
A : B
3 : 4
Ratio of age 5 years from now,
A : B
4 : 5
⇒ (4 - 3) units = 10
⇒ 1 unit = 10 years,
⇒ Present age = 4 x 10 - 5 : 5 x 10 - 5
⇒ 35 : 45
⇒ The ratio of A and B, 10 years from now = 35 + 10 : 45 + 10 = 45 : 55 = 9 : 11.