An electric heater at 2 kW . Calculate the cost of using it for 2 h daily for the mount of sept. , if each unit costs Rs4
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Electric energy consumed by heater in one day=p×t
=2kw×2h
=4kwh
Electric energy consumed by heater in one month=4×30
=120kwh(sept:30 days)
=120 units
Cost of using heater=120 ×4
=Rs.480
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