the ratio of income of two persons is 11:7 and the ratio of their expenditures is 9:5 . if each of them manages to save Rs 400 per month , find their monthly incomes.
Answers
Answered by
63
income ratio = 11:7
expenditure 9:5
11-9=2
7-5=2
so according to question 2 parts are saving which is rs 400.
=> 1 part =200
so 11 parts = 2200
and 7 parts = 1400.
so incomes are rs 2200 and rs 1400
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expenditure 9:5
11-9=2
7-5=2
so according to question 2 parts are saving which is rs 400.
=> 1 part =200
so 11 parts = 2200
and 7 parts = 1400.
so incomes are rs 2200 and rs 1400
please thank me if you like
Answered by
30
Answer:
Consider the monthly income of both be 11x and 7x and expenditure be 9y and 5y.
According to the question,
11x - 9y = 400
7x - 5y = 400
by using elimination method,
77x - 63 y = 2800 -------(1)
77x - 55y = 4400 ----------(2)
Substract (2) from (1) we get
77x -77x -63y +55y = 2800 - 4400
-8 y = -1600
y = 1600/8 = 200
then x = 1400/7 = 200
∴ the incomes of both are,11x = Rs.2200 and 7x = Rs.1400 .
Step-by-step explanation:
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