2012 AMC 12A 第 2 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。
2.
Cagney 每 秒给一个纸杯蛋糕涂糖霜，Lacey 每 秒给一个纸杯蛋糕涂糖霜。两人一起工作， 分钟内可以给多少个纸杯蛋糕涂糖霜？
Cagney can frost a cupcake every seconds and Lacey can frost a cupcake every seconds. Working together, how many cupcakes can they frost in minutes?
小提示：
把 分钟换成秒，或计算每人每分钟能完成多少个纸杯蛋糕
Convert minutes to seconds, or count each person’s cupcakes per minute
大提示：
分钟内，Cagney 完成 个，Lacey 完成 个
In minutes Cagney frosts and Lacey frosts
解答：
分钟共有 秒。Cagney 给 个纸杯蛋糕涂糖霜，Lacey 给 个纸杯蛋糕涂糖霜。
两人合起来完成 个纸杯蛋糕。
因此，正确答案是 D。
In minutes there are seconds. Cagney frosts cupcakes and Lacey frosts cupcakes.
Together they frost cupcakes.
Thus, the correct answer is D.
其他年份的第 2 题
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