阿Q吧 > “中华人民共和国道路交通管理条例”规定：小汽车在城街路上行驶速度不得超过70km⼀h．如图，一辆小汽车在

“中华人民共和国道路交通管理条例”规定：小汽车在城街路上行驶速度不得超过70km⼀h．如图，一辆小汽车在

2025-03-16 12:48:07
推荐回答（1个）
回答1：

在Rt△ABC中，AC=30m，AB=50m；
据勾股定理可得：
BC＝
AB2?AC2
＝
502?302
＝40（m）
∴小汽车的速度为v=
40
2
=20（m/s）=20×3.6（km/h）=72（km/h）；
∵72（km/h）＞70（km/h）；
∴这辆小汽车超速行驶．
答：这辆小汽车超速了．

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