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devesh99: Junior | Next Rank: 30 Posts; Posts: 14; Joined: Wed Feb 18, 2009 4:56 pm; Thanked: 1 times

by devesh99 » Mon Mar 23, 2009 1:06 pm

Any help for solution is deeply appreciated.

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Source: Beat The GMAT — Problem Solving | Mon Mar 23, 2009 1:06 pm

moadhia: Senior | Next Rank: 100 Posts; Posts: 64; Joined: Fri Nov 21, 2008 6:42 am; Thanked: 1 times

by moadhia » Mon Mar 23, 2009 3:19 pm

area of fabric = area of hoop

hoop has a radius of X so area of hoop is pie*X^2

x = pie * (X^2)

1 = pie * X

X = 1/ pie

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