请问一道GWD数学题啊~~~~~~~~

linhan50 · 发表于 2012-3-12 22:34:28

The figure above shows the dimensions of a semicircular cross section of a one-way tunnel.The single traffic lane is 12 feet wide and is equidistant from the sides of the tunnel.If vehicles must clear the top of the tunnel by at least ½ foot when they are inside the traffic lane, what should be the limit on the height of vehicles that are allowed to use the tunnel?

A.5½ ft
B.7½ ft
C.8 ½ ft
D.9½ ft
E.10 ft
Answer:

linhan50 · 发表于 2012-3-12 22:35:57

自己顶一下，图的话，就是GWD31套题里的第二套，的第八题。图也貌似有点问题

kevingod · 发表于 2012-3-13 00:08:09

用勾股定理算出来8feet就顶到头了，因为要留1/2的空隙，所以最高7.5feet

kevingod · 发表于 2012-3-13 00:08:48

我这图画的。。。见谅吧

linhan50 · 发表于 2012-3-14 23:54:38

非常感谢，

请问一道GWD数学题啊~~~~~~~~

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