Circumference of a circle is equal to

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2 πr

\frac{πr}{2}

2 + \frac{πr}{2} r

πr

answer is B.

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Detailed Solution

It is given to find the circumference of the circle.
The circumference of a circle is the perimeter of the circle. It is the total length of the boundary of the circle. The circumference of a circle is the product of the constant π and the diameter of the circle.
Therefore, circumference of a circle whose radius is equal to

r

is given by

2 πr .

Hence, option 2 is correct.

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