1986 AMC 8 第 19 题
先试着解答 1986 AMC 8 第 19 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 1986 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。
19.
旅行开始时，里程表读数为 英里。司机给油箱加满了 加仑汽油。旅途中，当里程表读数为 时，司机又给油箱加了 加仑汽油。旅行结束时，司机又加了 加仑汽油；此时里程表读数为 。按最接近的十分之一计算，整段旅行中汽车平均每加仑行驶多少英里？
At the beginning of a trip, the mileage odometer read miles. The driver filled the gas tank with gallons of gasoline. During the trip, the driver filled the tank again with gallons of gasoline when the odometer read At the end of the trip, the driver filled the tank again with gallons of gasoline; the odometer read To the nearest tenth, what was the car’s average miles-per-gallon for the entire trip?
答案：D
小提示：
旅途中用掉的油只包括出发后补加的油： 加仑
The gas used during the trip is only what was added after the start: gallons
大提示：
用总行驶英里数除以旅途中用掉的加仑数
Divide the total miles driven by the gallons used during the trip
解答：
旅行距离是 英里。最初的 加仑只是出发前加满油箱；旅途中真正用掉的是后来为补回油量所加的 加仑。
所以平均值是 英里每加仑。
所以正确答案是 D。
The trip was miles. The initial gallons only topped off the tank before the trip; the gas actually used during the trip is the gallons later added to replace it.
So the average is miles per gallon.
Thus, the correct answer is D .
其他年份的第 19 题
- 1985 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
- 2001 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
- 2019 AMC 8
- 2020 AMC 8
- 2022 AMC 8
- 2023 AMC 8
- 2024 AMC 8
- 2025 AMC 8
- 2026 AMC 8