Question

The circumference of a circle is 31.4 feet. What is the circles radius?

Answer 1

R = 5 Feet

Explanation:

First of all, I will demonstrate with a model like this.

31.4 = 2 x 3.14 x r

Divide both sides by 2 x 3.14 and we'll get

5 = R

The radius is 5 feet

Answer 2

radius = 4.996feet

approximately to 5feet

Explanation:

from the question, given that the circumference of a circle = 31.4 feet

we are to find the radius of the circle.

note that the formula for finding the circumference of a circle = 2πr

where r = ?

π = 3.142

circumference of a circle = 2 × 3.142 × r

31.4 = 6.284r

divide both side by the coefficient of r

we have

31.4/ 6.284 = 6.284r/6.284

4.996 = r

therefore the radius of a circle whose circumference is 31.4 feet is 4.996feet approximately to 5feet