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What is the area of a circular region that has a circumferen

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What is the area of a circular region that has a circumferen [#permalink] New post 23 Mar 2018, 00:08
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What is the area of a circular region that has a circumference of 10π?

A)√10π
B)5π
C)10π
D)25π
E)30π
[Reveal] Spoiler: OA
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Re: What is the area of a circular region that has a circumferen [#permalink] New post 23 Mar 2018, 00:47
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Circumference is 2pi*r. Therefore, radius is 5 and area is Pi \(r^2\) or 25pi
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Re: What is the area of a circular region that has a circumferen   [#permalink] 23 Mar 2018, 00:47
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