IBPS PO Mains 2015 Paper for online practice

Let present ages of Samir and Tanuj are 8x and 15x years respectively.
Difference between their ages = 15x – 8x = 7x
Ratio of ages after 9 years,

8x+9

15x+9

=

11

18

⇒ 144x + 162 = 165x + 99
⇒ 21x = 63 Þ x = 3
Difference between their ages = 7x = 21 years