Chapter 12.3, Problem 36CCR

To determine

To find: The circumference and area of circle

Answer to Problem 36CCR

  $\text{circumference=25}\text{.14mm}$, $\text{area=50}{\text{.28mm}}^{\text{2}}$

Explanation of Solution

Given information:

We know that, Diameter of circle = $8mm$

Formula used:

  ${\text{circumference=2πr,area=πr}}^{\text{2}}$

Calculation:

  $\text{circumference=2×}\frac{\text{22}}{\text{7}}\text{×4}$

  $\text{=25}\text{.14mm}$

  $\begin{array}{l}\text{area=}\frac{\text{22}}{\text{7}}\text{×4×4}\\ \text{=50}{\text{.28mm}}^{\text{2}}\end{array}$