Question

compute the diameter of the circle with a circumference of 65.94​

Answer 1

$\bf \textit{circumference of a circle}\\\\ C=\pi d~~ \begin{cases} d=diameter\\ \cline{1-1} C=65.94 \end{cases}\implies 65.94=\pi d\implies \cfrac{65.94}{\pi }=d\implies \stackrel{\pi =3.14}{21 = d}$