The ratio of ages of the father and mother was 11:10, when their son was born. The ratio of ages of the father and mother will be 19 : 18, when the son will be 4 times of his present age. What will be the ratio of present age of father and mother?
Answer & explanation
Correct answer: option 2
When son was born:
Father : Mother
11 : 10
Let son's present age = y years
Now, ATQ
\(\frac{11R + 4y}{10R + 4y}\) = \(\frac{19}{18}\)
⇒ 198R + 72y = 190R + 76y
⇒ 8R = 4y
⇒ y = 2R
Ratio of present age of Father and Mother:
⇒ \(\frac{11R + 2R}{10R + 2R}\) = \(\frac{13R}{12R}\) = 13 : 12