Answer:
The length of the fence is 45.09ft
Step-by-step explanation:
To solve this exercise we first have to calculate the radius of the pool and then add the 4 foot we want to distance it.
r = radius
π = 3.14
c = circumference = 20ft
c = π * 2r
we clear r
r = c / 2π
now we replace the values we know
r = 20ft / 2 * 3.14
r = 3.18ft
now we add the 4 feet we want away
3.18ft + 4ft = 7.18ft
r = 7.18ft
c2 = π * 2r
c2 = 3.14 * 2 * 7.18
c2 = 45.09ft
The length of the fence is 45.09ft
