Question

The ratio of the income to the expenditure of a family is 9:4. Find the income if the saving is RS 3600.

Answer 1

let the income be 9x

so expenditure is 4x

hence 9x - 4x = 3600
5x = 3600
x =720

income 9× x = 720 × 9 = 6480₹

hope it helps