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标题: 求助,GWD1-Q18,已解决 [打印本页]

作者: 暗绯莎    时间: 2010-3-5 18:51
标题: 求助,GWD1-Q18,已解决
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

完全算不出来。。。好吧我承认我题目都没怎么看懂。。。
(搜索君告诉我以前也有人问,不过没人回答。。OTL,于是就再问一下吧)

作者: jessicaddq    时间: 2010-3-6 19:28
答案是B吗?
作者: 暗绯莎    时间: 2010-3-7 00:14
是。。。怎么做的??
作者: feel1979    时间: 2010-3-7 00:53
(5+3x)^2=整个面积
(5+x)^2=square patio 的面积
两个相减=132=walkway的面积
x=3

(3+5)^2=64
作者: 暗绯莎    时间: 2010-3-7 01:00
了解了,谢谢




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