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The sides of a square region, measured to the nearest

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Manager
Joined: 08 Aug 2008
Posts: 229

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The sides of a square region, measured to the nearest [#permalink]

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10 Nov 2008, 00:03
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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.

i cant seem to find the catch in this question....how can we minimise the side already measured to be 6?

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SVP
Joined: 17 Jun 2008
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10 Nov 2008, 00:26
D.

The smallest possible side that can round to 6 cm will be 5.5 cm and the area of sqaure with side 5.5 cm will be 30.25 sq cm.

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Manager
Joined: 08 Aug 2008
Posts: 229

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10 Nov 2008, 00:31
super..so the catch in question is about rounding off as "approximately" suggests that...
anythng >5.5 can be rounded off to 6..so 5.5 is the mimimum length we can have.

thanks.

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Re: PS- SQUARE AREA   [#permalink] 10 Nov 2008, 00:31
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