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If the area of square S and the area of circle C are equal,

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Director
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If the area of square S and the area of circle C are equal, [#permalink] New post 29 Nov 2004, 21:01
If the area of square S and the area of circle C are equal, then the ratio of the perimeter of S to the circumference of C is closest to



a. 7/9 b. 9/8 c. 9/8 d. 4/3 e. 2/1


Enjoy! :P
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 [#permalink] New post 29 Nov 2004, 21:04
Hey, just want to say that it's good to see you back Titleist. It's been a while buddy. :circle
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Best Regards,

Paul

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Hey Paul! [#permalink] New post 29 Nov 2004, 21:12
Hi Paul! Thanks for the greetings it's good to be back - had a death in the family, changed careers, and found a girlfriend. Ready to get back to business and take the GMAT in December! I'm reading all these posts of guys who started posting at the time I started who have broken the 700 barrier - it's very encouraging. I'm assuming you're one of them.

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 [#permalink] New post 29 Nov 2004, 21:13
I will go for A, the answer i got is 7/11. :)
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 [#permalink] New post 29 Nov 2004, 21:14
Sorry not the "right" answer. Don't feel bad - this is one of those weird PR questions.
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 [#permalink] New post 29 Nov 2004, 21:20
9/8?

I get to 2/P^-2 which is approximately 2/1.75 but then stuck with answer choices.
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 [#permalink] New post 29 Nov 2004, 21:23
you have the same answer in the options b and c, is it 2/3 by any chance.
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 [#permalink] New post 29 Nov 2004, 21:24
Yes! very good. I guess 9/8 as answer choice b and c helped a little. :lol: my bad.

answer choice c (or b)
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 [#permalink] New post 30 Nov 2004, 09:27
I get E. well i dunno if I am wrong but this is how I have done.

square of the side is s
radius of circle is r

s^2= pi * r^2
s= (sqrt of Pi) * r

ratio of the perimeters= 4s/2 * pi * r
substituting value of s..
i get 2/sqrt of pi which is equvialent to 2/1.77 so going with E
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 [#permalink] New post 30 Nov 2004, 09:54
1.
S = pi*R^2
C = a^2.
S = C -> a*a = pi*R*R - > a = R*sqrt(pi)
2.
Pc = 2*pi*R and Ps = 4*a
->
Pc/Ps = pi*R/(2*a) = sqrt(pi)/2 ~ .89 ~ 8/9
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 [#permalink] New post 30 Nov 2004, 10:58
isn;t it square: circle and not the otherway around..
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 [#permalink] New post 30 Nov 2004, 22:35
a....closest ratio I got is 7/11 ..answer would less than this.
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 [#permalink] New post 01 Dec 2004, 06:47
can somebody please post OA?
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 [#permalink] New post 01 Dec 2004, 09:10
I think it's 2/3, read my comments above in the discussion.
  [#permalink] 01 Dec 2004, 09:10
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If the area of square S and the area of circle C are equal,

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