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An electric heater draws a current of 10A from a 220V supply. What is the cost of using the heater for 5 hrs everyday for 30 days if the cost of 1unit is RS 5.20  
Asked by nishamiyan652 | 28 Jan, 2020, 11:30: AM
answered-by-expert Expert Answer
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
Answered by Thiyagarajan K | 28 Jan, 2020, 01:24: PM

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