Chapter 11.7, Problem 11PPS

To determine

To find the circumference of the circle, rounded to the nearest tenth.

Answer to Problem 11PPS

  $17.9$ centimeters

Explanation of Solution

Given information: Diameter (d) $=5.7$ centimeters.

Formula used: Circumference (c) of a circle can be calculated using formula $2\times \pi \times r$

Where ‘r’ is the radius $=\frac{d}{2}$

For calculations, value of $\pi =\frac{22}{7}$

Calculation:

  $c=2\times \pi \times r$

Formula to calculate the circumference of a circle.

  $=2\times \frac{22}{7}\times \frac{5.7}{2}$

Putting the value of the radius which is half of the diameter. Dividing the common numbers from the numerator and denominator.

  $=17.90$

Rounding off this to the nearest tenth.

  $=17.9$ centimeters.