题目内容
图为某城郊道路示意图,却发现歹徒在A地作案后,乘车沿AD道路逃窜,警方同时接到报警,并立即由B地乘警车沿BE拦截,歹徒到达D点后,沿DE逃窜,警车恰好在E点追上歹徒,已知警车与歹徒车辆行驶速度均为60 km/h,AC="4" km,BC="6" km,DE="5" km,则歹徒从A地逃窜至被抓获共历时多少时间?
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241141524091652.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241141524091652.jpg)
10 min
因两者运动速度相等,且运动时间相等,故
(如图),即
,解之得
="3" km,
=10 km,所以
h=10 min。
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241141525492049.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114152425684.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114152440888.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114152456250.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114152487469.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114152487339.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241141525492049.jpg)
![](http://thumb2018.1010pic.com/images/loading.gif)
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