IBPS RRBs Officer Scale II and III Sep 2013 Paper

(1)
Let Trisha’s and Shalini’s present ages be 7x and 6x years respectively.
After 8 years,

7x+8

6x+8

=

9

8

⇒56x + 64 = 54x + 72
⇒2x = 72 – 64 = 8
⇒ x = 4
⇒Required difference
= 7x – 6x
= x = 4 years