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If the diameter of circle A is eight times that of circle B,

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If the diameter of circle A is eight times that of circle B, [#permalink] New post 06 Oct 2020, 10:32
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57% (02:04) correct 42% (00:54) wrong based on 7 sessions
If the diameter of circle A is eight times that of circle B, what is the ratio of the area of circle A to the area of circle B ?

A. 4: 1

B. 8: 1

C. 16: 1

D. 32: 1

E. 64: 1
[Reveal] Spoiler: OA

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Re: If the diameter of circle A is eight times that of circle B, [#permalink] New post 06 Oct 2020, 20:34
given
d1/d2 = 8

A1/A2 = \(π(d1)^2 /π(d2)^2\) = 64/1

option E is correct
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Re: If the diameter of circle A is eight times that of circle B,   [#permalink] 06 Oct 2020, 20:34
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If the diameter of circle A is eight times that of circle B,

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