Question

3. The monthly incomes of two families A and B are in the ratio of the areas of rectangles
A and B respectively. If the income of family B is 12000, then find the income of 2
the family A​

Answer 1

step-by-step explanation:

Ratio of the monthly incomes of families A and B

= Ratio of the areas of rectangles A and B

= 5 × 2 : 4 × 1

= 10 : 4

= 5 : 2

Let the monthly income of family A be Rs. x

Then,

5 : 2 :: x : 12000

⇒ 2x = 5 × 12000 = 60000

⇒x = 60000/2=30000