The following squares represent the monthly income of two families<br><img src="/images/question-image/arithmetic-ability/area/1574230757-19.png" title="Area mcq question image" alt="Area mcq question image"><br>If the monthly income of family A is Rs. 40000, the monthly income of family B is ?
Correct Answer: Rs. 90000
$$\frac{{{\text{Monthly income of family A}}}}{{{\text{Monthly income of family B}}}}$$ $$ = \frac{{{\text{Area of square A}}}}{{{\text{Area of square B}}}}$$
$$\eqalign{ & \Rightarrow \frac{{40000}}{x} = \frac{{{2^2}}}{{{3^2}}} \cr & \Rightarrow x = \left( {\frac{{40000 \times 9}}{4}} \right) \cr & \Rightarrow x = 90000 \cr} $$
$$\eqalign{ & \Rightarrow \frac{{40000}}{x} = \frac{{{2^2}}}{{{3^2}}} \cr & \Rightarrow x = \left( {\frac{{40000 \times 9}}{4}} \right) \cr & \Rightarrow x = 90000 \cr} $$
