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# A classroom with a square floor and vertical walls has 1 wall with win

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Math Expert
Joined: 02 Sep 2009
Posts: 49303
A classroom with a square floor and vertical walls has 1 wall with win  [#permalink]

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27 Sep 2017, 04:50
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Difficulty:

15% (low)

Question Stats:

91% (00:47) correct 9% (00:13) wrong based on 34 sessions

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A classroom with a square floor and vertical walls has 1 wall with windows and 3 walls without windows. If the windows do not reach the ceiling, what percent of the total wall space of the room can consist of windows? (Assume the walls to be equal in height).

(A) less than 25%
(B) 25%
(C) between 25 and 50%
(D) 50%
(E) more than 50%

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Intern
Joined: 02 Sep 2016
Posts: 15
GMAT 1: 660 Q50 V29
Re: A classroom with a square floor and vertical walls has 1 wall with win  [#permalink]

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27 Sep 2017, 06:48
Let X and Y are length and width of vertical walls.

Total area of 4 walls is 4XY.

Area of window is less than XY

So the percent of totl wall space consist of windows is < (XY/4XY)*100 = < 25%
Target Test Prep Representative
Affiliations: Target Test Prep
Joined: 04 Mar 2011
Posts: 2835
Re: A classroom with a square floor and vertical walls has 1 wall with win  [#permalink]

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01 Oct 2017, 12:11
Bunuel wrote:
A classroom with a square floor and vertical walls has 1 wall with windows and 3 walls without windows. If the windows do not reach the ceiling, what percent of the total wall space of the room can consist of windows? (Assume the walls to be equal in height).

(A) less than 25%
(B) 25%
(C) between 25 and 50%
(D) 50%
(E) more than 50%

Since only one wall has windows and the windows do not reach the ceiling, the percentage of wall space covered by windows is less than 1/4 or 25%.

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Jeffery Miller

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Re: A classroom with a square floor and vertical walls has 1 wall with win &nbs [#permalink] 01 Oct 2017, 12:11
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# A classroom with a square floor and vertical walls has 1 wall with win

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