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Circumference of circular region

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Circumference of circular region [#permalink] Post   24 Sep 2018, 12:05
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Question Stats:

76% (00:32) correct 23% (00:39) wrong based on 92 sessions

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Quantity A
Quantity B
Circumference of circular region C diameter d
Perimeter of rectangular with region R with length 2d and width d


A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.
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B
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imransuet
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Re: Circumference of circular region [#permalink] Post   05 Oct 2018, 20:42
B is the answer
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Re: Circumference of circular region [#permalink] Post   10 Jun 2020, 17:24
The circumference of circle is defined by: C = pi * diameter, and this case:

A = pi * d = around 3.14*d

B = 2d*2 + d*2 = 6d

so if d is non-negative B always is greater than A. Answer is B.
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Re: Circumference of circular region [#permalink]
10 Jun 2020, 17:24
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