2018 AMC 8 第 12 题
先试着解答 2018 AMC 8 第 12 题，然后核对你的答案与视频与精心整理的解答，解答来自 LIVE by Po-Shen Loh。你也可以参加完整限时模拟考试、查看全部 2018 AMC 8 解答，或核对答案。
所有题目均经美国数学协会（MAA）官方合法授权使用。
12.
Sri 车里的钟不准，并且以恒定速度走快。某天他开始购物时，车钟和他准确的手表都显示中午 整。购物结束时，他的手表显示 ，车钟显示 。当天晚些时候，Sri 弄丢了手表。他看车钟，显示 整。实际时间是多少？
The clock in Sri’s car, which is not accurate, gains time at a constant rate. One day as he begins shopping he notes that his car clock and his watch (which is accurate) both say noon. When he is done shopping, his watch says and his car clock says Later that day, Sri loses his watch. He looks at his car clock and it says What is the actual time?
小提示：
比较车钟多走的时间和真实经过的时间
Compare how much time the car clock gains to how much real time passes.
大提示：
车钟的 分钟对应真实的 分钟
The car clock’s minutes correspond to actual minutes.
视频讲解：
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文字解答：
从 中午开始，真实经过 分钟时，车钟走快到经过了 分钟。
因此车钟每走一分钟，真实时间经过 分钟。从 到 ，车钟走了 分钟，所以真实时间经过了 分钟，也就是 小时。从 开始经过 小时，实际时间是 。
所以正确答案是 B。
Starting from noon, after minutes of time elapsed, the car clock went minutes ahead.
Therefore, for every minute the car clock goes ahead, minutes of actual time pass by. From the time to the car clock goes ahead minutes, and therefore, minutes, or hours, of actual time have passed by. If we start at and hours pass by, the time is
Thus, B is the correct answer.
其他年份的第 12 题
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