Question

The radius of a dime measures 8.96 millimeters About how long is the outer edge of a dime? 25 mm 35 mm 45 mm 55 mm

Answer 1

The outer edge of a dime is the circumference of the dime

`\begin{gathered} \text{circumference of a dime(circle) = 2}\pi r \\ =\text{ 2 x 3.14 x 8.89} \\ =56.26\text{ mm} \end{gathered}`

The closest to the length of the edge from the options given is 55mm