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The figure above shows the dimensions of a living room floor that is

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The figure above shows the dimensions of a living room floor that is [#permalink]

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New post 19 Feb 2014, 12:08
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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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Re: The figure above shows the dimensions of a living room floor that is [#permalink]

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New post 19 Feb 2014, 15:27
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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 3045 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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Re: The figure above shows the dimensions of a living room floor that is [#permalink]

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New post 23 Nov 2015, 14:57
mikemcgarry wrote:
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

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 :-)

what's the significance of the "overlapping part" I did not get that also I don't get why we are subtracting 16-4 for BC and adding 13 and 5 for AB.

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Re: The figure above shows the dimensions of a living room floor that is [#permalink]

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New post 25 Nov 2015, 11:15
Hi sagnik242,

The prompt tells us that the floor has to be covered by 2 different RECTANGLE carpets that do NOT overlap. Since the room is NOT a rectangle, we have two different ways to place rectangle carpets within it.

1) 2 carpets laid down 'left-to-right'
2) 2 carpets laid down 'north-to-south'

For the first option, the dimensions of the two carpets would be 13x16 and 5x20

For the second option, the dimensions of the two carpets would be 18x12 and 5x4

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Re: The figure above shows the dimensions of a living room floor that is [#permalink]

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New post 05 Oct 2016, 20:23
The common error that usually hits us is when we look at the diagram as two halves divided at the particular segment as made evident by the image.
Thinking like a business solver and look for other possibilities that what meets the eye.

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Re: The figure above shows the dimensions of a living room floor that is [#permalink]

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New post 13 Oct 2017, 12:50
This problem tricked me initially. I thought the smaller segment - DEF(G)- was a square. I think the best way to solve this problem is as follows:

1. Draw an imaginary line from point D down to line AF. This creates a smaller rectangle with an area of 20 (4*5).
2. Now find the sides of the larger rectangle: 16-4 = 12, which is the length, and 13+5 = 18, which is the width. Multiply these two figures together and you get 216 (18*12), which is the answer.

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Re: The figure above shows the dimensions of a living room floor that is [#permalink]

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New post 14 Oct 2017, 04:14
I wish the could specify that the carpet used would miss leave out part of the geometry as the 216 area leaves out the 20 area.
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Re: The figure above shows the dimensions of a living room floor that is   [#permalink] 14 Oct 2017, 04:14
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