Geometry

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bburton11: Junior | Next Rank: 30 Posts; Posts: 29; Joined: Tue Dec 23, 2008 11:42 am; Thanked: 1 times

by bburton11 » Wed Jun 10, 2009 5:26 am

A rectangular region has a fence along three sides and a wall along the fourth side. The fenced side opposite the wall is twice the length of each of the other two fenced sides. If the area of the rectangular region is 128 square feet, what is the total length of the fence, in feet?

Answer: 32

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Source: Beat The GMAT — Problem Solving | Wed Jun 10, 2009 5:26 am

tohellandback: Legendary Member; Posts: 752; Joined: Sun May 17, 2009 11:04 pm; Location: Tokyo; Thanked: 81 times; GMAT Score:680

by tohellandback » Wed Jun 10, 2009 5:34 am

area=2x^2=128
x=8
so length of fence=x+x+2x=32

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The powers of two are bloody impolite!!

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