25. Ah electric heater is rated at 20W.Calculate the cost of using it for 2h daily for month of sep. if each
unit cost 4Rs.
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Answer:
480
Explanation:
Energy consumed = power × time
= 2 × 2 = 4KWH
Energy consumed for the month of september = 4×30= 120 kwh =120 unit
Cost = 120×4=Rs 480
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