Question

The area of circular garden is 615.44 feet2. What is the circumference of the garden? (Use 3.14 for .)

A.
205.15 feet
B.
87.92 feet
C.
43.96 feet
D.
307.72 feet

Answer 1

The answer is B.

Step-by-step

• The formula for the circumference of a circle using area is: C =
  `2\sqrt{\pi A`

Using this, we can simply plug in the numbers for the formula...

• A = 615.44 and Pi = 3.14

Plugging this number for A into equation..
`2\sqrt{615.44*3.14`

• Put that into your calculator, you'd get 87.92. Therefore, B is your answer

Answer 2

87.92

Explanation:

Consider the following equations for a circle:

Diameter: r x 2

Area: pi x r^2

Circumference: 2 x pi x r

(r equals radius)

All we have to do is figure out what the radius is, so we can calculate the circumference!

615.44/pi = 196

sqrt 196 = 14

14 x 2 x pi = 87.92 feet