Question

The ratio of incomes of two persons A and B is 3 : 4 and the ratio of their expenditures is 5 : 7. If their savings are ₹ 15,000 annually find their annual incomes. What value will be promoted if expenditure is under control?<br /> i will mark you as a brainielist

Answer 1

Given ratio of incomes= 3:4

Ratio of their expenditures= 5:7

Saving money of each person annually= ₹ 15000

Let incomes of two persons be 3x and 4x and the expenditures be 5y and 7y.

ATQ

3x - 5y = 15000……………(1)

4x - 7y= 15000…………….(2)

Multiplying equation 1 by 7 and equation 2 by 5,

21x - 35y = 105000………(3)

20x - 35y = 75000…………(4)

On subtracting equation 4 from eq 3,

21x - 20 x = 105000 - 75000

x = 30000

On putting x = 30000 in eq 1,

3x - 5y = 15000

3(30000) - 5y = 15000

90000 -5y = 15000

-5y = 15000 - 90000

-5y = -75000

y = 75000/5 = 15000

y = 15000

Hence, annual income of both persons are

3(30000)= ₹ 90000 & 4(15000)= ₹ 120000.

ii) Saving attitude and economic value.

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Answer 2

check the attachment