Salaries of A and B are in the ratio 1 : 3. If the salary of each is…

 Let Actual salary of A's  = 1R

 & Actual salary of B's  = 3R

Now, ATQ

⇒ \(\frac{1R\;+\;2000}{3R\;+\;2000}\) = \(\frac{3}{4}\)

⇒ (4R ) + (8000) = (9R ) + (6000 )

⇒ 5R = 2000

⇒ R = \(\frac{2000}{5}\) = 400

Here,

B's salary = 3R =  3 × 400  = Rs.1200/-