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What’s the area of a circle whose radius is 7 units?

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42 π

{unit}^{2}

49 π

{unit}^{2}

54 π

{unit}^{2}

60 π

{unit}^{2}

answer is B.

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Detailed Solution

We have been given the radius of a circle is 7 units.
We know, the area of the circle is calculated by,
Area of a circle

= π r^{2}

, where r is the radius of the circle
Substituting the value in the formula,

\Rightarrow

πr2

\Rightarrow π \times 7 \times 7

\Rightarrow 49 π

{unit}^{2}

Therefore, the area of the circle is 49π

{unit}^{2}

.
Hence, option 2 is correct.

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