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Concentration: General Management, Entrepreneurship

GMAT 1: 650 Q42 V37

GRE 1: 1310 Q630 V680

GPA: 3.16

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

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13 Nov 2010, 12:58

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63% (02:04) correct
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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

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

Concentration: General Management, Entrepreneurship

GMAT 1: 650 Q42 V37

GRE 1: 1310 Q630 V680

GPA: 3.16

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

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14 Nov 2010, 20:17

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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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Each moment of time ought to be put to proper use, either in business, in improving the mind, in the innocent and necessary relaxations and entertainments of life, or in the care of the moral and religious part of our nature.

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).

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

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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

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