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题库 / GMATAdvanced-DS-52
The top surface area of a square table top 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.
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
EACH statement ALONE is sufficient.
Statements (1) and (2) TOGETHER are NOT sufficient.
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根本考單字...
dimension 指的是边长，如果是长方形的话，就是长和宽，如果是长方体的话，就是长宽高
所以1) (x-1)(x+2)=70 求x2. 可得x=8
b为什么对呢？没说哪一边增长呢？
2/0.25
是正方形
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a square table，正方形桌子
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