GIVEN: Monthly salary of A and B is Rs. 90000 combined. A spends 75% of his salary and B spends 80% of his salary. CONCEPT: Savings = Income – Expenditure CALCULATION: Let the salary of A be Rs. x then the salary of B will be Rs. (90000 – x) ∵ A saves 25% and B saves 20% ⇒ 0.25x = 0.2 × (90000 – x)⇒ 0.45x = 18000 ⇒ x = 40000 ∴ Salary of A = Rs. 40000