Use the above figure to answer the question. How long is arc ACB if the radius of the circle is 6? Round your answer to two decimal places.

After a thorough research, there exists the same question that has the following choices.

A. 6.29

B. 12.57

C. 18.86

D. 25.13

The correct answer is letter B 12. 57

First, we need to get the circumference

C = 2*pi*r

C = 12 pi

360 / 60+60 = 360/120 = 3

12 pi / 3 = 4 pi = 4 x 3.1415 = 12.57