Subject: General Aptitude · Chapter: Area · Exam: · Marks: · Difficulty:
The following squares represent the monthly incomes of two families  If the monthly income of family A is ₹ 40000, the monthly income of family B is
(a)₹ 50000
(b)₹ 60000
(c)₹ 90000
(d)₹ 120000
Answer
Answer (as printed): C
Explanation
$\frac{\text { Monthly income of family } A}{\text { Monthly income of family } B}=\frac{\text { Area of square A }}{\text { Area of square B }}$ $$\Rightarrow \frac{40000}{x}=\frac{2^{2}}{3^{2}} \Rightarrow x=\left(\frac{40000 \times 9}{4}\right)=90000 .$$
Explanation as extracted from the printed page; notation may be imperfect.