Question

Marie 连续做三项耗时相同的任务，中间不休息。她下午 $1\!:\!00$ 开始第一项任务，下午 $2\!:\!40$ 完成第二项任务。她什么时候完成第三项任务？

Marie does three equally time-consuming tasks in a row without taking breaks. She begins the first task at $1\!:\!00$ PM and finishes the second task at $2\!:\!40$ PM. When does she finish the third task?

下午三点十分

3:10 PM

下午三点半

3:30 PM

下午四点

4:00 PM

下午四点十分

4:10 PM

下午四点半

4:30 PM

答案：B

知识点：日期与时间

难度评级：560

解答：

完成 $2$ 项任务共用 $100$ 分钟，所以每项任务用 $50$ 分钟。从 $2:40$ 起再过五十分钟就是 $3:30$ 。

所以正确答案是 B。

The time it takes to do $2$ tasks is $100$ minutes. Thus, it takes $50$ more minutes after $2:40,$ which is $3:30.$

Thus, the correct answer is B .

2015 AMC 10B 第 2 题

答案：B

难度评级：560

解答：

其他年份的第 2 题