Chapter 11.7, Problem 4CYU

To determine

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

Answer to Problem 4CYU

  $33$ centimeters

Explanation of Solution

Given information: Diameter(d) $=10.5$ 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, take value of $\pi =\frac{22}{7}$ .

Calculation:

  $c=2\times \pi \times r$

Formula to calculate the circumference of the circle.

  $=2\times \pi \times \frac{d}{2}$

Since ‘r’ is half of ‘d’

  $=2\times \frac{22}{7}\times \frac{10.5}{2}$

On simplifying the expression.

  $=32.98$

Rounding this figure to the nearest tenth.

  $=33.0$ centimeters.