Question
The ratio of the monthly income of C and D is 9:14,
respectively, and their expenditures are Rs. 1500 and Rs. 3500, respectively. Find the difference between their incomes if the ratio of the monthly saving of C to D is 6:9.Solution
According to the question: Let the monthly income of C = Rs. 9y Monthly income of D = Rs. 14y According to the question, (9y – 1500):(14y – 3500) = 6:9 9(9y – 1500) = 6(14y – 3500) 81y – 13500 = 84y – 21000 21000 – 13500 = 84y – 81y 7500 = 3y y = 2500 Difference between their incomes = 14y – 9y = 5y = 5 × 2500 = Rs.12500
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