Question

The circumference of a circle is 6.28 kilometers. What is the circle's radius?

Use 3.14 for Pi.

Answer 1

Radius = 1 kilometer.

Explanation:

Radius = circumference / (2*3.14)

Radius = 6.28 / (6.28)

Radius = 1 kilometer

Answer 2

Radius is 1

2πr is circumference. 6.28=2*3.14*r. so r=1 simplified.