Question

If a circle has an area of 31,400 inches what is its circumference

Answer 1

Given:

If a circle has an area of 31,400 inches.

Required:

what is its circumference

Step-by-step explanation:

We know the area of circle formula

`\begin{gathered} \pi r^2=31400 \\ r=99.97 \end{gathered}`

Also, circumference of circle

`\begin{gathered} =2\pi r \\ =2*\pi*99.97 \\ =628.13\text{ in} \\ =628\text{ in \lparen approx.\rparen} \end{gathered}`

Answer:

Option A is correct.