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Three walls have wallpaper covering a combined area of 300 square mete

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Three walls have wallpaper covering a combined area of 300 square mete [#permalink]

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Question Stats:

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T.O. Sets gave me trouble, so I came up with another example to practice. Hope it helps you, too.

Three walls have wallpaper covering a combined area of 300 square meters. By overlapping the wallpaper to cover a wall with an area of 180 square meters, the area that is covered by exactly two layers of wallpaper is 36 square meters. What is the area that is covered with three layers of wallpaper?

A. 5 Square Meters
B. 36 Square Meters
C. 42 Square Meters
D. 83.3 Square Meters
E. 120 Square Meters
[Reveal] Spoiler: OA

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Last edited by rockzom on 14 Nov 2010, 20:12, edited 1 time in total.

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Re: Three walls have wallpaper covering a combined area of 300 square mete [#permalink]

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Re: Three walls have wallpaper covering a combined area of 300 square mete [#permalink]

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Total = Group1 + Group2 + Group3 - (sum of 2-group overlaps) - 2*(all three)

OR; 180 = 300 - 36 - 2* (exactly 3 overlap)

OR; 2* (exactly 3 overlap) = 264-180 = 84

OR; (exactly 3 overlap) = 42

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Re: Three walls have wallpaper covering a combined area of 300 square mete [#permalink]

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S = Single
D = Double
T = Triple

S + 2D + 3T = 300
S + D + T = 180

Subtract.

D + 2T = 120

36 is the double overlap, so...

36 + 2T = 120
2T= 120-36
2T = 84
T = 42

Or C.
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Re: Three walls have wallpaper covering a combined area of 300 square mete [#permalink]

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New post 14 Nov 2010, 20:46
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rockzom wrote:
T.O. Sets gave me trouble, so I came up with another example to practice. Hope it helps you, too.

Three walls have wallpaper covering a combined area of 300 square meters. By overlapping the wallpaper to cover a wall with an area of 180 square meters, the area that is covered by exactly two layers of wallpaper is 36 square meters. What is the area that is covered with three layers of wallpaper?

A. 5 Square Meters
B. 36 Square Meters
C. 42 Square Meters
D. 83.3 Square Meters
E. 120 Square Meters


300 - 180 = 120 sq m of the wallpaper overlaps (in either two layers or three layers)
If 36 sq m has two layers, 120 - 36 = 84 sq m of the wallpaper overlaps in three layers. 84 sq m makes two extra layers hence the area over which it makes two extra layers is 42 sq m.
Answer (C).

Similar question:
three-rugs-have-a-combined-area-of-102326.html
This question has 'Rug' instead of 'Wallpaper'
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Re: Three walls have wallpaper covering a combined area of 300 square mete [#permalink]

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New post 02 Aug 2017, 00:06
rockzom wrote:
T.O. Sets gave me trouble, so I came up with another example to practice. Hope it helps you, too.

Three walls have wallpaper covering a combined area of 300 square meters. By overlapping the wallpaper to cover a wall with an area of 180 square meters, the area that is covered by exactly two layers of wallpaper is 36 square meters. What is the area that is covered with three layers of wallpaper?

A. 5 Square Meters
B. 36 Square Meters
C. 42 Square Meters
D. 83.3 Square Meters
E. 120 Square Meters


What is the difficulty level of this question; wish to solve more like this.........
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Re: Three walls have wallpaper covering a combined area of 300 square mete [#permalink]

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New post 29 Sep 2017, 23:11
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VeritasPrepKarishma wrote:
rockzom wrote:
T.O. Sets gave me trouble, so I came up with another example to practice. Hope it helps you, too.

Three walls have wallpaper covering a combined area of 300 square meters. By overlapping the wallpaper to cover a wall with an area of 180 square meters, the area that is covered by exactly two layers of wallpaper is 36 square meters. What is the area that is covered with three layers of wallpaper?

A. 5 Square Meters
B. 36 Square Meters
C. 42 Square Meters
D. 83.3 Square Meters
E. 120 Square Meters


300 - 180 = 120 sq m of the wallpaper overlaps (in either two layers or three layers)
If 36 sq m has two layers, 120 - 36 = 84 sq m of the wallpaper overlaps in three layers. 84 sq m makes two extra layers hence the area over which it makes two extra layers is 42 sq m.
Answer (C).

Similar question:
http://gmatclub.com/forum/three-rugs-ha ... 02326.html
This question has 'Rug' instead of 'Wallpaper'


Hi karishma,

I can't comprehend the question. I get the solution, but i feel the question is weakly worded. Is it so? If not please explain the question.
Thanks,

Kudos [?]: 9 [1], given: 67

Expert Post
1 KUDOS received
Veritas Prep GMAT Instructor
User avatar
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Joined: 16 Oct 2010
Posts: 7788

Kudos [?]: 18098 [1], given: 236

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Re: Three walls have wallpaper covering a combined area of 300 square mete [#permalink]

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New post 30 Sep 2017, 00:00
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rever08 wrote:
VeritasPrepKarishma wrote:
rockzom wrote:
T.O. Sets gave me trouble, so I came up with another example to practice. Hope it helps you, too.

Three walls have wallpaper covering a combined area of 300 square meters. By overlapping the wallpaper to cover a wall with an area of 180 square meters, the area that is covered by exactly two layers of wallpaper is 36 square meters. What is the area that is covered with three layers of wallpaper?

A. 5 Square Meters
B. 36 Square Meters
C. 42 Square Meters
D. 83.3 Square Meters
E. 120 Square Meters


300 - 180 = 120 sq m of the wallpaper overlaps (in either two layers or three layers)
If 36 sq m has two layers, 120 - 36 = 84 sq m of the wallpaper overlaps in three layers. 84 sq m makes two extra layers hence the area over which it makes two extra layers is 42 sq m.
Answer (C).

Similar question:
http://gmatclub.com/forum/three-rugs-ha ... 02326.html
This question has 'Rug' instead of 'Wallpaper'


Hi karishma,

I can't comprehend the question. I get the solution, but i feel the question is weakly worded. Is it so? If not please explain the question.
Thanks,


Yes, the language of this question is suspect.
Check this question: https://gmatclub.com/forum/three-rugs-h ... ml#p794940
It is very similar and the language is fine.
_________________

Karishma
Veritas Prep | GMAT Instructor
My Blog

Get started with Veritas Prep GMAT On Demand for $199

Veritas Prep Reviews

Kudos [?]: 18098 [1], given: 236

Re: Three walls have wallpaper covering a combined area of 300 square mete   [#permalink] 30 Sep 2017, 00:00
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Three walls have wallpaper covering a combined area of 300 square mete

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