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The figure above shows the dimensions of a living room floor

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The figure above shows the dimensions of a living room floor [#permalink] New post 19 Feb 2014, 11:08
00:00
A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

74% (01:19) correct 26% (00:53) wrong based on 19 sessions
The figure above shows the dimensions of a living room floor that is to be covered completely
with two nonoverlapping rectangular pieces of carpet. What is the area, in square feet, of the
largest piece of carpet that can be used?

A: 80 B: 156 C: 208 D: 216 E: 288

The question looks overly simple, but might not be what we thinking after all.
[Reveal] Spoiler: OA

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Magoosh GMAT Instructor
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Re: The figure above shows the dimensions of a living room floor [#permalink] New post 19 Feb 2014, 14:27
Expert's post
gmatbull wrote:
The figure above shows the dimensions of a living room floor that is to be covered completely with two nonoverlapping rectangular pieces of carpet. What is the area, in square feet, of the largest piece of carpet that can be used?

A: 80 B: 156 C: 208 D: 216 E: 288

The question looks overly simple, but might not be what we thinking after all.

I'm happy to respond. :-)

As in so many GMAT problems, the diagram is wildly deceiving, and is bound to lead one into all kinds of incorrect assumptions. Here's a scaled diagram:
Attachment:
floor with rectangular carpet.JPG
floor with rectangular carpet.JPG [ 16.19 KiB | Viewed 341 times ]

The diagram suggest, for example, that BC and DE are about the same size, as CE and EF would seem. The scaled diagram makes clear that the dimension we aren't given are much bigger and make the difference. Here, BC = 16 - 4 = 12, and AB = 13 + 5 = 18. The biggest piece of carpet has corners A & B & C and the point on AF below D, and it has an area of 12*18 = 216.

Does all this make sense?
Mike :-)
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Mike McGarry
Magoosh Test Prep

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Re: The figure above shows the dimensions of a living room floor   [#permalink] 19 Feb 2014, 14:27
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