Circumference of the circle is given as = 220 feet
We have to find the diameter.
Circumference is found as = 2 * PI * r
[tex]220=2*3.14*r[/tex]
[tex]220=6.28r[/tex]
r=35.03
Diameter is 2*radius
Diameter = [tex]2\times35.03[/tex] = 70.06
Hence, diameter of the circle is 70.06 feet.