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What is the perimeter of a square that has the same area as a circle

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Joined: 02 Sep 2009
Posts: 42579

Kudos [?]: 135467 [0], given: 12695

What is the perimeter of a square that has the same area as a circle [#permalink]

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New post 16 Nov 2017, 00:44
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A
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C
D
E

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Question Stats:

21% (00:37) correct 79% (01:11) wrong based on 29 sessions

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What is the perimeter of a square that has the same area as a circle that has circumference 1?

(A) 4√π
(B) 2/√π
(C) 1/(2√π)
(D) 1/π
(E) 1
[Reveal] Spoiler: OA

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Kudos [?]: 135467 [0], given: 12695

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Joined: 07 Dec 2014
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Kudos [?]: 291 [0], given: 16

What is the perimeter of a square that has the same area as a circle [#permalink]

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New post 16 Nov 2017, 12:41
Bunuel wrote:
What is the perimeter of a square that has the same area as a circle that has circumference 1?

(A) 4√π
(B) 2/√π
(C) 1/(2√π)
(D) 1/π
(E) 1


π2r=1
r=1/2π
r^2=1/4π^2
πr^2=1/4π=s^2
s=√1/4π
4s=1/(2√π)
C

Kudos [?]: 291 [0], given: 16

What is the perimeter of a square that has the same area as a circle   [#permalink] 16 Nov 2017, 12:41
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