Question

The area of a circle is 1256 square inches what is the length of its radius

Answer 1

The formula of the area of a circle is :
`A= \pi R^2`

You know that the area is 1256.

So :
`1256= \pi R^2`

Divide both sides by
`\pi` :


`(1256)/(\pi)=R^2`

take the square root of both sides in order to obtain r :


`\sqrt{ (1256)/( \pi )}=R`

`20=R`

In short, the answer would be 20 (i have rounded).

Hope this helps !

Photon