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# Rectangle

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Rectangle [#permalink]  08 Feb 2004, 07:47
The answer given was C. But I think B is sufficient.
See attached.

What is the area of the rectangular region above?

1. l + w = 6
2. d^2 = 20
Attachments

216.doc [23.5 KiB]

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I could not find the drawing with the attachment
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if D^2 = 20 then a^2 = 10 b^2 = 10 and area = 10
a^2 = 15 b^2 = 5 area = sqrt(75)

Each time area is different.

d^2 = l^2+w^2 = (l+w)^2 - 2lw
20 = 6^2-2lw
lw = (36-20)/2 = 8 which is the area.
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