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A square counter top has a square tile inlay in the center,

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A square counter top has a square tile inlay in the center, [#permalink]

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New post 02 Aug 2008, 02:54
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A square counter top has a square tile inlay in the center, leaving an untiled strip of uniform width around the tile. If the ratio of the tiled area to the untiled area is 25 to 39,which of the following could be the width, in inches, of the strip?
I. 1
II. 3
III. 4

A I only
B II only
C I & II only
D I & III only
E. I,II & III
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Re: kitchen counter [#permalink]

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New post 02 Aug 2008, 23:30
arjtryarjtry wrote:
A square counter top has a square tile inlay in the center, leaving an untiled strip of uniform width around the tile. If the ratio of the tiled area to the untiled area is 25 to 39,which of the following could be the width, in inches, of the strip?
I. 1
II. 3
III. 4

A I only
B II only
C I & II only
D I & III only
E. I,II & III


consider side of smaller square as y and unifiorm width = n
side of larger square = y+2n
area of larger square is A1=(y+2n)^2
Smaller square is A2=y^2 => remaining area= A1-A2=4*n*(y+n)

hence ratio of areas of smaller to remaining is y^2/n*y*(y+n) =25/39=>substitute n= values from options and if we get equations which can be solved then that solution works ,I and II only solve the equations hence C is the answer
:) OA pls
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Re: kitchen counter [#permalink]

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New post 02 Aug 2008, 23:34
arjtryarjtry wrote:
A square counter top has a square tile inlay in the center, leaving an untiled strip of uniform width around the tile. If the ratio of the tiled area to the untiled area is 25 to 39,which of the following could be the width, in inches, of the strip?
I. 1
II. 3
III. 4

A I only
B II only
C I & II only
D I & III only
E. I,II & III


it E guys ... all we have got is a ratio... the actual strip width can be anything in inches or any other unit....
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Re: kitchen counter [#permalink]

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New post 25 Apr 2010, 05:24
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Re: kitchen counter   [#permalink] 25 Apr 2010, 05:24
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