Suppose the area of a circle is 201.0624 square feet. What's the diameter of the circle? (Use [tex]\pi=3.1416[/tex].)

A. 8 feet
B. 16 feet
C. 64 square feet
D. 64 feet



Answer :

To determine the diameter of the circle given that its area is 201.0624 square feet and using [tex]\(\pi = 3.1416\)[/tex], follow these steps:

1. Recall the formula for the area of a circle:
[tex]\[ A = \pi r^2 \][/tex]
where [tex]\(A\)[/tex] is the area and [tex]\(r\)[/tex] is the radius of the circle.

2. Rearrange the formula to solve for the radius [tex]\(r\)[/tex]:
[tex]\[ r = \sqrt{\frac{A}{\pi}} \][/tex]

3. Substitute the given values:
[tex]\[ r = \sqrt{\frac{201.0624}{3.1416}} \][/tex]

4. Calculate the radius:
[tex]\[ r = \sqrt{64} = 8 \, \text{feet} \][/tex]

5. Now, recall the relationship between diameter and radius:
[tex]\[ d = 2r \][/tex]
where [tex]\(d\)[/tex] is the diameter.

6. Using the calculated radius, find the diameter:
[tex]\[ d = 2 \times 8 = 16 \, \text{feet} \][/tex]

Thus, the diameter of the circle is [tex]\(16\)[/tex] feet. The correct answer is:

B) 16 feet