Question 1 slove answer full details

Satya · 1 May 2026

Given Ratios Income Ratio (R:S) = 7 : 9 Let Income of R = 7x Let Income of S = 9x Expenditure Ratio (R:S) = 4 : 5 Let Expenditure of R = 4y Let Expenditure of S = 5y 2. The Condition The question says: Expenditure of S = Income of R So, 5y = 7x Which means y = 7x / 5 3. Calculating Earnings (Income minus Expenditure) Earnings of R = 7x - 4y Substitute y: 7x - 4(7x / 5) = 7x - 28x / 5 = (35x - 28x) / 5 = 7x / 5 Earnings of S = 9x - 5y Substitute 5y with 7x: = 9x - 7x = 2x 4. Final Ratio Ratio = (7x / 5) : 2x Multiply by 5 to simplify: = 7x : 10x = 7 : 10 Final Answer: 7 : 10