In a house two coolers each of power 100W are on for 8 hour daily,5 fans each of 50W are on for 10; hours,one electric iron of 1000W is on for 2hours daily . calculate bill of electricity for one month (a) of Rs 6.10 per unit.
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Given : P=0.1 kW t=1 hour per day
Energy consumed per day E=Pt=0.1×1=0.1kWh per day
Total energy consumed per month ET=30×0.1=3 kWh per month
Cost of electricity =Re 1 per unit i.e per kWh
∴ Monthly bill =Re. 1×3=Rs. 3 per month
i hope its help
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