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The surface area of a square tabletop was changed so that

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The surface area of a square tabletop was changed so that [#permalink] New post 08 Sep 2005, 00:49
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The surface area of a square tabletop was changed so that one of the dimensions was reduced by 1 inch and the other dimension was increased by 2 inches. What was the surface area before these changes were made?

(1) After the changes were made, the surface area was 70 square inches.
(2) There was a 25 percent increase in one of the dimensions.

Last edited by trulyblessed on 08 Sep 2005, 09:31, edited 1 time in total.
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 [#permalink] New post 08 Sep 2005, 04:52
Let X be the side of the square

St1: (X-1)(X+2)=70
Solve for X; X=8
Suff
St2: 25% increase in one of dimensions
25%X=2; X =8
Suff

D
  [#permalink] 08 Sep 2005, 04:52
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The surface area of a square tabletop was changed so that

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