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Area of circle with radius [square_root]7[/square_root]

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Area of circle with radius [square_root]7[/square_root] [#permalink] New post 21 Jun 2018, 02:21
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Question Stats:

90% (00:32) correct 10% (00:17) wrong based on 10 sessions
Quantity A
Quantity B
Area of circle with radius \(\sqrt{7}\)
Area of circle with diameter \(\sqrt{14}\)



A The quantity in Column A is greater
B The quantity in Column B is greater
C The two quantities are equal
D The relationship cannot be determined from the information given
[Reveal] Spoiler: OA
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Re: Area of circle with radius [square_root]7[/square_root] [#permalink] New post 22 Jun 2018, 07:38
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amorphous wrote:
Quantity A
Quantity B
Area of circle with radius \(\sqrt{7}\)
Area of circle with diameter \(\sqrt{14}\)




For statement 1,

We know area of the circle = π \(r^2\)

= π \((\sqrt{7})^2\)

= 7π


In Statement 2,

We know area of the circle = π \(r^2\)

= π \((\sqrt{14})/2)^2\) (Since here diameter is given so we divide it by 2 to get the radius)

= \(\frac{14}{4}\) π

= \(\frac{7}{2}\) π, which is less than statement 1

Hence option A
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Re: Area of circle with radius [square_root]7[/square_root]   [#permalink] 22 Jun 2018, 07:38
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Area of circle with radius [square_root]7[/square_root]

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