作者jimmymiller (吉米米勒)
看板GRE_Verbal
标题Re: [计量]看瞴
时间Sat Sep 6 18:31:57 2008
※ 引述《magickaolu (Peliah)》之铭言：
: 请各位大大帮忙 感谢
: july electricity usage for household
: water heater:20%
: light.small appliances:9%
: large appliance:18%
: air conditioner:53%
: electricity used:800 kilowatt-hour
: Q: the electricity used by the water heater was measured separately and
: its cost per kilowatt-hour was one-half the cost per kilowatt-hour of the
: rest of the electricity used. The cost of the electricity used by the
: water heater was most nearly what fraction of the total cost of
: all the electricity used?
: a:1/11
: b:1/9
: c:1/8
: d:1/5
: 我实在是看不懂 只好求助於各位大爷了 感激
: 可不可以顺便解释一下
题目首先提供七月某家庭的用电情况
并告知 热水器的电费必须与其他电费分开计算
而每千瓦小时的热水器电费是其他部分用电的一半
请问该月热水器的电费是全部电费的几分之几?
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※ 编辑: jimmymiller 来自: 118.169.233.167 (09/06 18:32)
1F：→ magickaolu:谢感谢解答 61.228.201.171 09/07 13:44