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An electric refrigerator rated 400 w, operates 8 hour / day. What is the cost of theenergy to operate it for 30 days at Rs. 3-00 per Kwh? |
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Answer» Given, Power = P = 400W = 400/1000 kW = 0.4 kW Total time for which the refrigerator operated = t = 8 hours x 30 days = 240 h Since, Energy consumed = P x t E = 0.4 x 240 kWh = 96 kWh Therefore, total cost required to operate the refrigerator for the month = 96 x 30 = 2880 INR. |
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