1.

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?

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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