Given:
If a circle has an area of 31,400 inches.
Required:
what is its circumference
Explanation:
We know the area of circle formula
[tex]\begin{gathered} \pi r^2=31400 \\ r=99.97 \end{gathered}[/tex]
Also, circumference of circle
[tex]\begin{gathered} =2\pi r \\ =2\times\pi\times99.97 \\ =628.13\text{ in} \\ =628\text{ in \lparen approx.\rparen} \end{gathered}[/tex]
Answer:
Option A is correct.
