Chapter 11, Problem 32SGR

To determine

To calculate the circumference.

Answer to Problem 32SGR

125.71 km

Explanation of Solution

Given Information: Radius = 20 km.

Formula Used:Circumference of circle = $2\pi \times r$ , $\pi =\frac{22}{7}$

Calculation:

Radius = r.

Circumference of circle = $2\pi \times r$

Now, radius is of 20 km.

Circumference of circle = $2\pi \times 20$

Circumference of circle = $40\pi$

Now, $\pi =\frac{22}{7}$

Circumference of circle = $40\times \frac{22}{7}$

Circumference of circle = 125.71 km