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标题: 求助数学题 [打印本页]

作者: 羽依依 时间: 2008-12-16 07:34 标题: 求助数学题

图示一个小正方形在一个大正方形中间。大小的区别就是过道。。。帮忙

The figure shows a square patio surrounded by a walkway of width x meters. If the area of the walkway is 132 square meters and the width of the patio is 5 meters greater than the width of the walkway, what is the area of the patio, in square meters?

A. 56

B. 64

C. 68

D. 81

E. 100

作者: sisxoinouer 时间: 2008-12-16 19:08

大正方形的面积是（3x+5）^2=132+(x+5)^2.可以推出x=3.

则patio的边长=8，面积是64.

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