2001 AMC 8 第 15 题
先试着解答 2001 AMC 8 第 15 题，然后核对你的答案与精心整理的解答，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 2001 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。
15.
荷马开始以每分钟削 个土豆的速度削一堆 个土豆。四分钟后克里斯滕加入，以每分钟削 个土豆的速度削。完成时，克里斯滕削了多少个土豆？
Homer began peeling a pile of potatoes at the rate of potatoes per minute. Four minutes later Christen joined him and peeled at the rate of potatoes per minute. When they finished, how many potatoes had Christen peeled?
答案：A
小提示：
先求克里斯滕开始时还剩多少个土豆
Find how many potatoes remain when Christen starts
大提示：
之后他们合起来每分钟削 个
After that, their combined rate is per minute
解答：
克里斯滕加入时，荷马已经削了 个土豆，还剩 个。
荷马和克里斯滕合起来每分钟削 个土豆，因此还需要 分钟削完剩下的。
分钟内，克里斯滕削了 个土豆。
所以正确答案是 A。
Homer had peeled potatoes by the time Christen joined him, leaving potatoes.
Together, Homer and Christen peel potatoes per minute, taking them minutes to peel the rest.
In minutes, Christen peeled potatoes.
Thus, A is the correct answer.
其他年份的第 15 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
- 1993 AMC 8
- 1994 AMC 8
- 1995 AMC 8
- 1996 AMC 8
- 1997 AMC 8
- 1998 AMC 8
- 1999 AMC 8
- 2000 AMC 8
- 2002 AMC 8
- 2003 AMC 8
- 2004 AMC 8
- 2005 AMC 8
- 2006 AMC 8
- 2007 AMC 8
- 2008 AMC 8
- 2009 AMC 8
- 2010 AMC 8
- 2011 AMC 8
- 2012 AMC 8
- 2013 AMC 8
- 2014 AMC 8
- 2015 AMC 8
- 2016 AMC 8
- 2017 AMC 8
- 2018 AMC 8
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- 2020 AMC 8
- 2022 AMC 8
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- 2026 AMC 8