Chapter 0.7, Problem 10E

To determine

To calculate: The circumference of the given circle to the nearest tenth,

Answer to Problem 10E

The circumference of the circle is $\text{18}\text{.9 m}$ .

Explanation of Solution

Given information:

The figure is given in the question

Formula used:

Circumference $\left(C\right)$ of a circle with radius r units is denoted by $C=2\pi r$ .

Calculation:

Consider the figure

In the above figure the circle has the radius of 3 m, i.e. $r=3\text{ m}$ .

Recall that circumference $\left(C\right)$ of a circle with radius r units is denoted by $C=2\pi r$ .

Apply it,

  $\begin{array}{c}C=2\cdot \frac{22}{7}\cdot 3\\ =18.857\text{1 m}\end{array}$

Rounding off to the nearest tenth,

  $C=\text{18}\text{.9 m}$

Thus, the circumference of the circle is $\text{18}\text{.9 m}$ .