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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 20 Jul 2008, 20:14
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A
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E

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40% (00:10) correct 60% (00:58) wrong based on 56 sessions

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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: PS: square counter top - Could someone please explain  [#permalink]

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New post 20 Jul 2008, 20:56
explaination plz????????
but with some logic i thk it is A
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Re: PS: square counter top - Could someone please explain  [#permalink]

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New post 20 Jul 2008, 21:16
1
vksunder 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


E. the question only give the ratio of areas....

inside area = 25K
strip area = 39K
total area = 64K
k = sqrt(K)
out side length = 8k
inside length = 5k

width of strip = 1/2 (8k-5k) = 3/2k

put k = 2/3, get I
put k = 2, get II
put k = 8/3, get III
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Re: PS: square counter top - Could someone please explain  [#permalink]

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New post 21 Jan 2011, 17:19
1
I think there's a typo, the choices should be:
(I) 1 1/2 or 1.5
(II) 3
(III) 4 1/2 or 4.5

This is question PS 404, OG 10. Look for the official explanation, pretty straight forward.
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Re: PS: square counter top - Could someone please explain  [#permalink]

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New post 21 Jan 2011, 17:25
ezinis wrote:
I think there's a typo, the choices should be:
(I) 1 1/2 or 1.5
(II) 3
(III) 4 1/2 or 4.5

This is question PS 404, OG 10. Look for the official explanation, pretty straight forward.


This question is discussed here: http://gmatclub.com/forum/hard-problem- ... 89215.html

P.S. It doesn't matter what numbers are given in the answer choices as any (positive) width will be possible.

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

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New post 01 Aug 2018, 11:54
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Re: A square counter top has a square tile inlay in the center, &nbs [#permalink] 01 Aug 2018, 11:54
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