A circular garden with a radius of 8 feet is surrounded by a circular path with a width of 3 feet.

What is the approximate area of the path alone? Use 3.14 for [tex]\pi[/tex].

A. [tex]172.70 \, \text{ft}^2[/tex]
B. [tex]178.98 \, \text{ft}^2[/tex]
C. [tex]200.96 \, \text{ft}^2[/tex]
D. [tex]379.94 \, \text{ft}^2[/tex]



Answer :

Let's solve the problem step-by-step.

1. Calculate the radius of the outer circle (garden + path):

- The radius of the garden is [tex]\(8\)[/tex] feet.
- The width of the path is [tex]\(3\)[/tex] feet.
- Therefore, the radius of the outer circle, which includes both the garden and the path, is:
[tex]\[ \text{radius\_outer} = \text{radius\_garden} + \text{width\_path} = 8 \, \text{feet} + 3 \, \text{feet} = 11 \, \text{feet} \][/tex]

2. Calculate the area of the outer circle:

- The formula for the area of a circle is [tex]\(A = \pi r^2\)[/tex], where [tex]\(r\)[/tex] is the radius.
- Using [tex]\( \pi = 3.14 \)[/tex] and [tex]\( \text{radius\_outer} = 11 \)[/tex] feet:
[tex]\[ \text{area\_outer} = 3.14 \times (11 \, \text{feet})^2 = 3.14 \times 121 = 379.94 \, \text{square feet} \][/tex]

3. Calculate the area of the inner garden circle:

- Again, using the formula [tex]\(A = \pi r^2\)[/tex] and [tex]\( \text{radius\_garden} = 8 \)[/tex] feet:
[tex]\[ \text{area\_garden} = 3.14 \times (8 \, \text{feet})^2 = 3.14 \times 64 = 200.96 \, \text{square feet} \][/tex]

4. Calculate the area of the path alone:

- The area of the path is the difference between the area of the outer circle and the area of the inner garden circle:
[tex]\[ \text{area\_path} = \text{area\_outer} - \text{area\_garden} = 379.94 \, \text{square feet} - 200.96 \, \text{square feet} = 178.98 \, \text{square feet} \][/tex]

Thus, the approximate area of the path alone is [tex]\(\boxed{178.98 \, \text{square feet}}\)[/tex].