Answer:
The diameter of the ride is 44 feets.
Step-by-step explanation:
We have,
The circumference of the frame is about 138 ft.
It is required to find the diameter of the ride.
The circumference of means that the outer covering of the circle. It is given by the formula as follows:

r is radius
Since, 2r = d, diameter of circle

or
d = 44 feets
So, the diameter of the ride is 44 feets.