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CBSE Class 10 Answered

the electric heater is rated at 2 kilowatt electrical energy cost 4 rupees per kilowatt hour what is the cost of using the heater of 3 hours
Asked by 86047357aa | 07 Feb, 2021, 22:00: PM
answered-by-expert Expert Answer
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 
Answered by Shiwani Sawant | 11 Feb, 2021, 12:52: PM

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