Question

The circumference of a circle is 28x inches. What is the length of the radius of this circle?

14 in.
21 in.
28 in.
56 in.

Answer 1

14 in

Explanation:

The circumference is given as 28x, but it should be
`28\pi`

Now, the formula for circumference of a circle is C = 2πr

Where C is the circumference (given as 28π) and r is the radius

Lets plug it in and find r:

`C=2\pi r\\28\pi = 2\pi r\\r=(28\pi)/(2\pi)\\r=14`

THus, radius is 14 inches