费费详解:
42、A tunnel is a semicircular(直径20feet).A single lane(通道)is 12 feet,and the distance to the sides of the tunnel is the same.If all the vehicles passing the tunnel should leave at least 1/2 feet distance to the top of the tunnel.What is the max height of the vehicle allowed?
GG这道题目主要是画图,图形出来了,就简单了。
刚好是个直角三角形,斜边为半径(半径为20/2=10),隧道的高是一个直角边,另一个直角边为12/2=6,也就是求那个直角边,然后再剪去0.5
my question:
万一车厢是circular的呢。。。。。反正觉得这个题目不严密,怪怪的。。。
想太多了~这道题目也是GWD题~搜索一下GWD的题号吧~
不好意思,我就不帮你找链接了~
P.S. 说了车厢是长方形的吧?汗!
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