Question

what is the circumference of a circle with radius r=10

Answer 1

$\begin{gathered} \text{Circumference = 2 x }\pi\times r \\ r\text{ = 10} \\ \pi=3.14 \end{gathered}$$\begin{gathered} \text{Circumference = 2 }\times3.14\times10\text{ } \\ \text{Circumference = 62.8 units} \end{gathered}$