A) 9 : 1
B) 3 : 4
C) 3 : 1
D) 1 : 3
Correct Answer: C
Solution :
Let the areas of two square be \[9{{x}^{2}}\] and \[{{x}^{2}}\] respectively. Then the sides of them will be \[\sqrt{9{{x}^{2}}}\]and\[\sqrt{{{x}^{2}}}\]i.e,\[3x\]and\[x\]respectively. Hence, the ratio of their perimeter \[=\frac{4\times 3x}{4\times x}=3:1\]
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