electric heater draws a current of 12A from a 220V supply. What is the cost of using the heater for 4 hours everyday for 30 days if he cost of 1 unit is Rs 5.50?
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Explanation:
Current drawn=10A
Voltage=220V
Time=5hr
Electric energy consumed = VIt = 220×10×5
11000Wh = 11KWh
Energy consumed in one day = 11KWh
Energy consumed consumed in 30 days = 11×30 = 330KWh
Cost of one KWh = Rs 2.50
Cost of 330KWh= 330×2.50 = Rs. 825
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