An Electric refrigerator rated 300W operates 10 hr/day.What is the cost of energy to operate it for 30days at Rs.5 per kWh?
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Answer:
The Cost will be Rs. 4500.
Explanation:
Power = 300W
Time = 10 hrs
Units used in 1 day = [wattage*hours]/100
= [(300*10)/100] kWh
= [3000/100] kWh
= 30 kWh
Used used in 30 days = [30*30] kWh
= 900 kWh
Cost of 1 kWh = Rs. 5
Cost of 900 kWh = Rs. (900*5)
= Rs. 4500
Hope this helps.
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