《最新GMAT数学机考模拟150题》陈向东__036 请指教谢谢

qiqiusa

    

A square countertop has a square tile inlay
in the center, leaving an untiled strip of uniform width around the tile. If
the ratio of the tiled area to the untiled area is 25 to 39, which of the
following could be the  width, in inches,
of the strip?

    

. 
1

    

． 3

    

． 4

    

 

    

A. only

    

B. only

    

C. and only

    

D. and only

    

E. ,, and

    

 

    

正确答案是：E

    
    小弟题目不大能看懂，请大哥大姐帮忙翻译并告诉我怎么做的，谢谢了啊……

[此贴子已经被作者于2008-1-5 1:37:58编辑过]

cloudymind

又是一道玩文字游戏的题目

题目说的是一个正方形里挖了个小正方形的洞（剩下一个方的环了），小正方形的面积和环的面积之比25/39，问环的宽度。

没说单位，这个环可以维持原比例随意放大缩小，所以随便哪个width都可以， E