AFCAT I 16 Feb 2019 Paper

(b) Let the ages of Ram and Rahim 10 years ago be x and 3x years respectively.
After 5 years from now,
⇒

x+15

3x+15

=

2

3

⇒ 6x + 30 = 3x + 45
⇒ 3x = 45 - 30 ⇒ 3x = 15
⇒ x = 5
∴ Ratio of their present ages
= (x + 10) : (3x+10)
= 15 : 25 = 3 : 5