Solution:
The arc length of a circle is given by the following equation:
[tex]L=\theta R[/tex]where theta is the central angle and r is the radius of the circle. Then, replacing the given data into the previous equation, we get:
[tex]55=5R[/tex]solving for R, we get:
[tex]R\text{ = }\frac{55}{5}=\text{ 11}[/tex]then, the correct answer is:
[tex]R\text{ = 11}[/tex]