Question

donuts at Krispy Kreme are always perfectly round. The diameter of the circular donut is 6 inches. Which of the following is closest to the circumference of the donut?

Answer 1

The circumference of a donut is computed as follows:

$C=\pi\cdot D$

where D is the diameter of the donut. Substituting with D = 6,

$\begin{gathered} C=\pi\cdot6 \\ C=18.85\text{ in} \end{gathered}$