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Question

A house has six 40 watt lamps that are on for 5 hours a day and it has three 80-watt fans that are on far 10 hours a day. The cost of electricity is Rs. 2 per kilowatt-hour. For a 30-day month, the electricity bill of the house is

A
432
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B
20.6
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C
216
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D
24.6
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Solution

The correct option is C 216

Totalwathhourusedbylampsandfans=(6×40×5)+(3×80×10)=1200+2400=3600watthourin1dayEnergeyusedin30daymonth=30×3600=108,000cost=108,000×103×2216Rs


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