Question

An electric refrigerator rate 350W is used for 8hrs per day. An electric fan rated 750W used for 2hrs per day. Calculate the cost of using these appliances for 30days. It's the cost of 1 unit is RS. 4​

Answer 1

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.