Ratio, Proportion

Math and Mental Ability

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A and B have monthly income in the ratio 5:6 and monthly expenditure in the ratio 3:4. If they save Rs 1800 and Rs 1600 respectively, find the monthly income of B

Rs 3400

Rs 2700

Rs 1720

Rs 7200

Explanation:

Incomes of A and B=5x and 6x and expenses of A and B = 3y and 4y
Then, savings of A = 5x-3y = 1800---?(1)
Savings of B = 6x-4y = 1600---?(2)
By solving equations (1) and (2)
y = 1400
Monthly income of B = Expenses of B + savings of B= 4y+1600 = 4(1400) + 1600 = Rs.7200

By: MIRZA SADDAM HUSSAIN

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