Calculate the total cost of running the following electrical devices in the month of May, if the rate of 1 unit
of electricity is Rs. 12
a. Electrical split AC of 1000 W for 8 hours daily
b. Electrical Refrigerator of 250 W for 24 hours daily
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Answer:
Your answer is given below:
Explanation:
(i)
\\P_1 = 1000W = 1kW\\ t_1 = 5h
(ii)
\\P_2 = 400W = 0.4kW\\ t_2 = 10h
No. of days in in September, n - 30
\\E_1 = P_1\times t_1\times n\\E_1 = 1kW\times 5h\times 30 = 150kWh
\\E_2 = P_2\times t_2\times n\\E_2 = 0.4kW\times 10h\times 30 = 120kWh
Total energy = (150 + 120)kWh = 270kWh
Total cost = 270\times 6 = Rs. \ 1620
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