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标题: 请教一道数学题（og上的） [打印本页]

作者: jackie4u 时间: 2003-1-20 00:44 标题: 请教一道数学题（og上的）

A farmer has a field that measures 1000 ft wide by 2000 ft long. There is an untillable strip 20 ft wide on the inside edge of the field, and a 30 ft wide untillable strip bisects the field into two squares (approximate). Approximately what percentage of the field is tillable?

A)98%
B)93%
C)91%
D)90%
E)88%

确切的说是没看明白题目。。多谢。。[em04][em05]

作者: bpan007 时间: 2003-1-20 01:28

答案是什麼?

作者: jackie4u 时间: 2003-1-20 21:43

b?

作者: bpan007 时间: 2003-1-20 22:01

我算也是b

作者: jackie4u 时间: 2003-1-21 19:42

ft...讲讲吧。。

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