Given: One year ago, the ratio of salaries of A and B = 4 ∶ 5 The ratio of their individual salaries of last year and present year are 3 ∶ 4 and 2 ∶ 5 respectively, Their total salary for the present year = Rs. 256800 Calculation: According to the question: One year ago, Ratio of salary A and B A : B = 4 : 5 ----(1) Salary of A, Last year : present = 3 : 4 Salary of B, Last year : present = 2 : 5 In case of A, last year salary should be same as equation (1), became to in order to make that 3 as 4 multiply whole ratio by 4/3 Then, Salary of A = Last year : present = 3 : 4 ⇒ 3 × 4/3 : 4 × 4/3 ⇒ 4 : 16/3 In case of B, Last salary should be same as equation (1), became to in order to make 2 as 5 multiply whole ratio by 5/2 Then, Salary of B = Last year : present = 2 : 5 ⇒ 2 × 5/2 : 5 × 5/2 ⇒ 5 : 25/2 Let the present salary of A be Rs. 16x/3 And the present salary of B be Rs. 25x/2 Now, 16x/3 + 25x/2 = 256800 ⇒ 107x/6 = 256800 ⇒ x = Rs. 14400 The present salary of B = Rs. 25x/2 = (25/2) × 14400 = Rs. 180000 ∴ The present salary of B is Rs. 180000.