SOLUTION: A circle has an area of 841pi cm squared. Whats the circumference?

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Question 477914: A circle has an area of 841pi cm squared. Whats the circumference?
Found 2 solutions by mangopeeler07, ewatrrr:
Answer by mangopeeler07(462) About Me  (Show Source):
You can put this solution on YOUR website!
area of a circle = pi*r^2=841
841/pi=r^2
267.6986=r^2
16.36=r
circumference of a circle=pi*2r
pi*32.72=102.79 cm

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

A circle has an area of 841pi cm squared

 A = pi%2A841+=+pi%2Ar%5E2  r^2 = 841cm, r = 29cm and d = 58cm