Answer:
5.625 ft.
Explanation:
1) Area of circle = π r ²
2) Circumference = π X D (D = diameter = 2 X radius)
3) Area of sector = (angle / 360) X area of circle
4) Length of arc = (angle/360) π d
using the 4th formula,
1.75 = (112/360) π d
π d = 1.75 / (112/360) = 45/8
d = (45/8) / π
= 1.79.
Circumference = π X D
= 1.79π
= 45/8 = 5.625 ft.
* I added extra working out in this just to give better understanding of how it works.