Question

If the circumference of a circle is 36π, what is the length of a radius of the circle?

A. 6
B. 18
C. 36
D. 72

Answer 1

The answer is 6 (A)

Explanation:

The exact answer is 5.73, but I think in the question they are rounding to the nearest whole number, so the rounded answer is 6.

My work:

C = 2πr

r = C

2π = 36

2·π = 5.72958