The radius is the straight line from the center of the circle to the edge of the circle. The diameter is the straight line that goes from one edge to the other edge.
Therefore, the radius is half of the diameter, or
r=d/2
We know the diameter is 62 feet. Substitute 62 in for d.
r=62/2
r=31
The radius is 31 feet. This is not an option given, so the correct answer is none of the above.
