Re: [計量] 看瞴
※ 引述《muse1 (muse)》之銘言：
: water heater:20% 800*20%=160
: light.small appliances:9%
: large appliance:18%
: air conditioner:53%_____________
800*80%=640
let the cost per kilowatt-hour of the rest is x/kilowatt-hour(kh)
the water heater is (1/2)*x
[160*(1/2)x]/[160*(1/2)x+640*x]=1/9
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