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The diagonals of two squares are in the ratio of 3 : 2. Find the ratio of their areas.

9 : 4
9 : 2
9 : 5
9 : 7

Correct Answer: 9 : 4

Explanation:

Let the diagonals of the squares be 3x and 2x.
∴ Ratio of their areas = [(1/2) (3x²)] / [(1/2) (2x²)] = 9/4

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