Answer:
D
Step-by-step explanation:
To find the arc length, use the formula:
[tex]S =2\pi r \frac{Angle}{360}[/tex]
Here r = 20 and the angle = 210.
[tex]S =2\pi r \frac{Angle}{360} \\\\S =2\pi (20) \frac{210}{360} \\\\S=73.26667 = 73.3[/tex]
