What is the area of the rectangular surface that has length : DS Archive
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# What is the area of the rectangular surface that has length

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What is the area of the rectangular surface that has length [#permalink]

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02 Sep 2004, 23:44
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What is the area of the rectangular surface that has length x fts and width y fts?

A. y is the reciprocal of x
B. The perimeter of the rectangular surface is 5 fts?

Please provide the explainations also. Thanks
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03 Sep 2004, 02:14
A.

(A) If X=1/Y, then X*Y=1. Because S=X*Y, S=1.
(B) perimeter=2(X+Y), so you can only get X+Y=2.5, but still X*Y=?
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03 Sep 2004, 04:20
I think answer is A too.

st.1
X * the reciprocal Y should be always 1.

st.2
x + y = 2,50 but we cannot know what the lengths of them exactly are.
x = 1,50, y = 1,00
x = 1,75, y = 0,75

Please correct me if I am wrong.

Regards,

Alex
03 Sep 2004, 04:20
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