Question

The radius of a circular clock is 10.5 inches. Which measurement is closest to the circumference of the clock in inches?

Answer 1

The circumference of a circle is found by using the following formula:

`C=2\pi r`

Replace these values and find the circumference of the clock:

`\begin{gathered} C=2\pi\cdot10.5 \\ C=65.97 \end{gathered}`

The circumference of the clock must be close to 65.97.