Re: [計量] 看瞴
※ 引述《magickaolu (Peliah)》之銘言：
: 請各位大大幫忙 感謝
: 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
: 我實在是看不懂 只好求助於各位大爺了 感激
: 可不可以順便解釋一下
題目首先提供七月某家庭的用電情況
並告知 熱水器的電費必須與其他電費分開計算
而每千瓦小時的熱水器電費是其他部分用電的一半
請問該月熱水器的電費是全部電費的幾分之幾?
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※ 編輯: jimmymiller 來自: 118.169.233.167 (09/06 18:32)
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09/07 13:44, , 1F
09/07 13:44, 1F
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