an electric heater is heated at 2KW electric energy cost 4 per KWh what is the cost of using heater?
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Answer:
Rs.24
Explanation:
Electrical energy consumed in three hours =P×t=2kW×3hour=6kWh
Unit cost = Rs.4 per kWh
Therefore ,the cost of energy used for three hours = 4×6=Rs.24
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