500 ps test22 #12

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dunkin77: Master | Next Rank: 500 Posts; Posts: 269; Joined: Sun Apr 01, 2007 5:41 am

by dunkin77 » Sun Apr 15, 2007 10:23 am

Hi,

I thought the answer would be E) but actually C) seems to be the correct answer... Can anyone explain why? Thank you!

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Source: Beat The GMAT — Problem Solving | Sun Apr 15, 2007 10:23 am

jayhawk2001: Community Manager; Posts: 789; Joined: Sun Jan 28, 2007 3:51 pmFollowed by: 1 member; Location: Silicon valley, California; Thanked: 30 times

by jayhawk2001 » Sun Apr 15, 2007 12:02 pm

You have to deduct 1 inch twice from each of the sides of the outer
square to get the side for the inner square

So, 9 - 2 = 7 and hence perimeter is 28

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Cybermusings: Legendary Member; Posts: 559; Joined: Tue Mar 27, 2007 1:29 amFollowed by: 2 members; Thanked: 5 times

by Cybermusings » Wed Apr 18, 2007 2:58 am

Width = 1
When perimeter of outer frame = 2L + 2B = 36
L+B=18; Now deduct 2 from L and 2 from B
Sum = 2(L-2)+2(B-2)=2L+2B-4-4=2L+2B-8
= 36-8 = 28

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