2012 AMC 8 第 3 题
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所有题目均经美国数学协会（MAA）官方合法授权使用。
3.
二月 日，The Oshkosh Northwester 刊登的白昼时长为 小时 分钟，日出时间为 并把日落时间标为 ，而白昼时长和日出时间是正确的，但日落时间是错误的。太阳实际什么时候落下？
On February The Oshkosh Northwester listed the length of daylight as hours and minutes, the sunrise as and the sunset as The length of daylight and sunrise were correct, but the sunset was wrong. When did the sun really set?
:
:
:
:
:
答案：B
小提示：
将正确的白昼时长加到日出时间上。
Add the correct daylight length to the sunrise time.
大提示：
从上午 到中午是 小时 分钟。
From AM to noon is hours minutes.
视频讲解：
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文字解答：
从 起 小时后是 。也就是说，日出后 小时 分钟是 。距日落还有 分钟，所以实际日落时间是 。
所以正确答案是 B。
Since hours after is we can then say hours and minutes after sunrise is We then have more minutes until sunset, so sunset is
Thus, the answer is B .
其他年份的第 3 题
- 1985 AMC 8
- 1986 AMC 8
- 1987 AMC 8
- 1988 AMC 8
- 1989 AMC 8
- 1990 AMC 8
- 1991 AMC 8
- 1992 AMC 8
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