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krisraam: Master | Next Rank: 500 Posts; Posts: 221; Joined: Wed Jan 21, 2009 10:33 amFollowed by: 1 member; Thanked: 12 times

by krisraam » Sun Mar 22, 2009 12:48 pm

The sides of a square region, measured to the nearest centimeters, are 6 centimeters long.
The least possible value of the actual area of the square region is
A. 36.00 sq cm
B. 35.00 sq cm
C. 33.75 sq cm
D. 30.25 sq cm
E. 25.00 sq cm

How can we choose between D and E

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Source: Beat The GMAT — Problem Solving | Sun Mar 22, 2009 12:48 pm

lilu: Master | Next Rank: 500 Posts; Posts: 148; Joined: Wed Dec 10, 2008 5:13 pm; Location: SF, CA; Thanked: 12 times

by lilu » Sun Mar 22, 2009 1:01 pm

We know that the side of a square was rounded to 6 and we need to find the LEAST area. So the least value that would give 6 when rounded is 5.5 and 5.5^2=30.25
D

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