Chapter 11.8, Problem 42SR

To determine

To compute circumference of the circle.

Answer to Problem 42SR

  $78.6$ feet

Explanation of Solution

Given information: Radius $r=12.5$ feet.

Formula used: Circumference $c=2\times \pi \times r$

Calculation: Circumference $c=2\times \pi \times r$

Putting the value of ‘r’ in this equation.

  $c=2\times \frac{22}{7}\times 12.5$

Replacing $\pi =\frac{22}{7}$

  $=\frac{550}{7}$

Simplifying the fraction.

  $=78.57$

Rounding to the nearest tenth.

  $=78.6$ feet