Question

Kim 的航班上午十点三十四分从 Newark 起飞，下午一点十八分在 Miami 降落。两个城市在同一时区。如果她的飞行时间为 $h$ 小时 $m$ 分钟，其中 $0 \le m \lt 60$ ，那么 $h + m$ 是多少？

Kim's flight took off from Newark at 10:34 am and landed in Miami at 1:18 pm. Both cities are in the same time zone. If her flight took $h$ hours and $m$ minutes, with $0 \le m \lt 60,$ what is $h + m?$

$46$

$47$

$50$

$53$

$54$

答案：A

知识点：日期与时间时钟

难度评级：730

解答：

从上午十点三十四分到上午十一点是 $26$ 分钟，从上午十一点到下午一点是 $2$ 小时，从下午一点到下午一点十八分是 $18$ 分钟。

所以飞行时间为 $2$ 小时 $26 + 18 = 44$ 分钟。因此 $h = 2$ ， $m = 44$ ，且 $h + m = 46$ 。

因此，正确答案是 A。

From 10:34 am to 11:00 am is $26$ minutes, from 11:00 am to 1:00 pm is $2$ hours, and from 1:00 pm to 1:18 pm is $18$ minutes.

So the flight lasted $2$ hours and $26 + 18 = 44$ minutes. Thus $h = 2,$ $m = 44,$ and $h + m = 46.$

Thus, the correct answer is A.

2009 AMC 12A 第 1 题

答案：A

难度评级：730

解答：

其他年份的第 1 题