AMC 8 2004 Problem 12
AMC8 2004 年第 12 题
工程问题★★★☆☆
Problem Niki usually leaves her cell phone on. If her cell phone is on but she is not actually using it, the battery will last for 24 hours. If she is using it constantly, the battery will last for only 3 hours. Since the last recharge, her phone has been on 9 hours, and during that time she has used it for 60 minutes. If she doesn't use it any more but leaves the phone on, how many more hours will the battery last?
的手机通常不关机。如果她的手机是开着的，但她实际上没有使用，那么电池将持续 24 小时。如果她一直使用手机，电池只能使用 3 个小时。自从最近一次充电以来，她的手机已经开机 9 小时，在这段时间里，她使用手机的时间是 60 分钟。如果她不再使用手机进行通话，而是让手机待机，那么电池还能用多少小时？
- A.7
- B.8
- C.11
- D.14
- E.15
正确答案 · Correct Answer
B
解析 · Solution
解析整理中
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