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Jhansi has been using the given devices in her house. Calculate the current bill for one month @5//-"per unit." 1. 100 W TV for 12 hrs. 2. 80 W two fans for 10 hrs 3. 11 W four LED bulbs for 12 hrs.

Answer»

Solution :Power consumption of the given DEVICES in watt HOURS.
1. TV `rArr1xx100xx12=1200WH`
2. Fans `rArr2xx80xx10=1600WH`
3. LED bulbs `4xx11xx12=528WH`
Total = 3328WH
3328 WH MEANS 3.328 KWH
Power consumption for 1 day = 3.328 Units.
Power consumption for 30 days = 3.328xx30
99.84 U
Current bill `@5//-"per unit" =99.84xx5//-=Rs 499.20//-`


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