If the radius of a circle is a rational number, its area is given by a number which is:

rational

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irrational

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intergal

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a perfect square

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none of these

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Solution

The correct option is D irrational
Since A= $π r^{2}$ and $π$ is irrational and r is rational, A is irrational (The product of a rational number and an irrational number is irrational )

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