SOLUTION: how do I find the surface area of a sphere where the area of the great circle is 79 cm^2 ?

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Question 973129: how do I find the surface area of a sphere where the area of the great circle is 79 cm^2 ?
Found 2 solutions by Alan3354, MathLover1:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
how do I find the surface area of a sphere where the area of the great circle is 79 cm^2 ?
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pi%2Ar%5E2+=+79
SA+=+4pi%2Ar%5E2+=+316

Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!

area of the great circle is A+=+pi%2Ar%5E2
given: +pi%2Ar%5E2=79cm%5E2=> solve for r
+r%5E2=79cm%5E2%2F3.14
+r%5E2=25.15923566878981cm%5E2
+r=sqrt%2825.16cm%5E2%29
+r=5.016cm

Surface area of a sphere+=+4pi%2A+r%5E2
sphere+=+4%2A3.14%2A+%285.016cm%29%5E2
sphere+=+12.56%2A+25.16cm%5E2
sphere+=+316.0096cm%5E2...round it
sphere+=+316cm%5E2