Question

The area of a circle is 100π in². What is the circumference, in inches? Express your answer in terms of pi

Answer 1

Answer:

Solution :

Area of circle = 100 π inches²

• πr² = 100 π
• r² = 100
• r = 10 inches

Circumference = 2 π r

• 2 x π x 10
• 20 π

Answer = 20 π inches

Answer 2

Here is the answer to your question:

Area of circle = πr^2

πr^2=100π

r^2 = 100

r=10

Circumference of circle=2πr

=2×π×10

=20π inches