Question

the ratio of monthly income to the savings in a family is 5:4 if the savings be 9000rs , then find the income and the expenses

Answer 1

This question is an example of Ratio and Proportion.

Ratio= 5:4. ((income:saving))

Let the income be x
5:4::x:9000
4x=45000
x=45000/4
x=11250

Family's income will be ₹11250

Answer 2

Hello,
we have that:
income/savings = 5/4;
income / 9000 = 5/4;
Then:
income = 9000×5/4= 2250×5=11250 
now we calculate the expenses:
expensens=income-saving=11250-9000=2250  

bye :-)