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  3. Triangular garden ABC is redesigned by increasing the length of AC by 20 percent to point C and decreasing the length of AB by 2

Triangular garden ABC is redesigned by increasing the length of AC by 20 percent to point C and decreasing the length of AB by 2

admin2009-05-19  104
问题
Triangular garden ABC is redesigned by increasing the length of AC by 20 percent to point C and decreasing the length of AB by 20 percent to point B .

Column A                                    Column B
The area of the original garden ABC         The area of the redesigned garden AB’C’
选项 A、if the quantity in Column A is greater
B、if the quantity in Column B is greater
C、if the two quantity are equal
D、if the relationship cannot be determined from the information given
答案A
解析 重新设计三角形花园ABC，使其AC边长增加20％到C’点；AB边长减少20％到B’点。
解：本题的正确答案为(A)。从表面上看，好像是变化前后花园的面积大小不变，但是若考生根据题意列出方程就可发现，变化后花园的面积是减小了：S(△AB’C’)= 0.96S(△ABC)
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本试题收录于： GRE QUANTITATIVE题库GRE分类
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