Answer:
25.142857 ft
Explanation:
first calculate the radius of the inner circle, 88/2 = 44
44/PI (22/7)
the radius of the inner circle is 14ft, now we add the additional 4 ft distance between each circle onto the 14 ft. this results in 18 ft.
now we calculate the circumference of the outer circle by using R = 18.
2R (pi (22/7)) this gives us a circumference of 113.142857.
now we subtract
113.142857 - 88 = 25.142857
the answer is 25.142857 ft