An electric heater draws a current of 10 A from a 220 V supply. What is the cost of using the heater 5 hours per day for 30 days if the cost of 1 unit is Rs. 2.50?
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Answer:
Rs. 1716
Explanation:
Electrical power drawn by heater = 220 V × 10 A = 2200 W = 2.2 kW
Energy consumed per month = 2.2 kW × 5 (hrs / day )× 30 ( days /month) = 330 kW-hr / month
Cost of electrical energy = 330 × Rs. 5.20 = Rs. 1716
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