Question #N22
A circle has a radius of 5 units. What is the circumference of this circle? (Use $\pi = 3.14$)
A. 15.7
B. 31.4
C. 62.8
D. 78.5
Correct Answer is: B
The circumference of a circle is given by the formula $C = 2 \pi r$, where $r$ is the radius. Substituting 5 for $r$ and 3.14 for $\pi$ gives $C = 2 (3.14) (5) = 31.4$.