SOLUTION: A circle has an area of approximately 615.75 in2. What is the circumference of the circle? Use 3.14 for π .

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Question 1199296: A circle has an area of approximately 615.75 in2.
What is the circumference of the circle? Use 3.14 for
π
.

Found 2 solutions by ikleyn, MathLover1:
Answer by ikleyn(52790) About Me  (Show Source):
You can put this solution on YOUR website!
.
A circle has an area of approximately 615.75 in2.
What is the circumference of the circle? Use 3.14 for π.
~~~~~~~~~~~~~~~~

From  pi%2Ar%5E2 = 615.75 in^2 find


    r%5E2%7D%7D+=+%7B%7B%7B615.75%2F3.14 = 196.0987

    r = sqrt%28196.09870%29 = 14 inches (rounded).


Next calculate the circumference  S = 2%2Api%2Ar = 2*3.14*14  inches.


To get the value, use your calculator.

Solved.



Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!
A circle has an area of approximately 615.75in%5E2.
A=r%5E2%2Api
615.75in%5E2=r%5E2%2A3.14
r%5E2=615.75in%5E2%2F3.14
r%5E2=196in%5E2
r=sqrt%28196in%5E2%29
r=14in

the circumference of the circle is
C=2r%2Api
C=2%2A14in%2A3.14
C=87.92in