SOLUTION: If the area of a circle is 49pi, what is the circumference. I got 22cm

Algebra ->  Surface-area -> SOLUTION: If the area of a circle is 49pi, what is the circumference. I got 22cm      Log On


   

Question 92915: If the area of a circle is 49pi, what is the circumference. I got 22cm
Answer by psbhowmick(878) About Me  (Show Source):
You can put this solution on YOUR website!
Area:
pi%2Ar%5E2+=+49%2Api
r%5E2+=+7%5E2
r+=+7

Circumference:
2%2Api%2Ar+=+2%2822%2F7%297+=+44

So the circumference is 44 cm.