A certain household appliance consumes 15 kWh of electrical energy every day. If the cost of 1 kWh is rupees seven, then the cost of electricity bill for the month of August is
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Given : P=0.1 kW t=1 hour per day
Energy consumed per day E=Pt=0.1×1=0.1 kWh per day
Total energy consumed per month E
T
=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
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