Question

The circumference of a circle of radius $r$ is given by ___.

• A. $\pi r$
• B. $2\pi r$
• C. $4\pi r$
• D. $\frac{\pi r}{2}$

Answer 1

The correct option is B

$2\pi r$

The circumference of a circle of radius $r$ units is equal to $2\pi r$ units where, r is the radius of the circle.