Question

The circumference of a circular garden is approximately 20 feet. What is the approximate area inside the circular garden?

Answer 1

So

• 2πr=20
• πr=10
• r=10/π

Now

Area

• πr²
• πr(r)
• 10r
• 10(10/π)
• 100/π
• 31.8ft²

Answer 2

31.85 square feet

Explanation:

Finding the radius :

• C = 2πr
• 20 = 2πr
• r = 20/2π
• r = 10/π

Substituting in the area formula :

• A = πr²
• A = π × 10/π x 10/π
• A = 100/π
• A = 100/3.14
• A = 31.85 square feet