If the radius of a circle be 5 cm, then its area will be equal to

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If the radius of a circle be 5 $cm$ , then its area will be equal to

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25 π c m^{2}

None of these

20 π c m^{2}

10 π c m^{2}

answer is B.

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Detailed Solution

Let r be the radius of circle
We know that,

area = π r^{2} c m^{2}

.
Therefore, the area of the circle is

\Rightarrow π r^{2}

\Rightarrow π {(5)}^{2}

\Rightarrow 25 π

So area of the circle is

25 π c m^{2} .

Hence, option 2 is correct,

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