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In a hous there are 20 lamps of 60 W eac...

In a hous there are 20 lamps of 60 W each 10 fans which operate in 0.5A current . If main power supply is 220V , expense per kW h is 50 pise and each appliance runs 6 h per day then calculate the electric bill of November .

Text Solution

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November month has 30 days .
`therefore` Total time `=30xx6h=180h,50"paise"=Rs.0.5`
Powers of each fan = `220xx0.5=110W`
`therefore` Electrical energy ,
= `(60xx20+110xx10)/(1000)` ltbrge `(2300xx30xx6)/(1000)=23xx18kW.h` ltbr `therefore` Electric bill of November =Rs.`(23xxx18)xx0.5=Rs.207`
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