Correct Answer - Option 1 : 11 : 15
Given:
Four year ago the ratio of age of A and B is 9 : 13
Calculation:
⇒ (9x + 4 + 8)/(13x + 4 + 8) = 3/4
⇒ 36x + 48 = 39x + 36
⇒ x = 4
⇒ Present age of A = 9 × 4 + 4 = 40
⇒ Present age of B = 13 × 4 + 4 = 56
⇒ The ratio after 4 years = (40 + 4)/(56 + 4) = 44/60 = 11/15
∴ The required result will be 11/15.