an electric heater is rated at 2 KW. Electrical energy costs Rs 4per KWh. What is the cost of using the heater for 3 hours
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rs 60 per km it will take a minute
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The electrci heater rating is 2kW
This means,
Power of electric heater (P) = 2 kW
Time for which the cost is to be calculated (t) = 3 hours
Thus, total electrical energy consumed (E),
E = P x t
= 2kW x 3 h
= 6 kWh
Cost of 1 unit = Rs. 4
Thus,
Cost of electricity (electrical energy consumed by electric heater for every 3 hours) = 6kWh x 4 = Rs. 24
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