Question

i m stuck at this!!
please solve!!
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Answer 1

Answer:

Given,

Power = 23W

Potential Difference = 220V

Cost of 1kWh = Rs. 0.8

Energy spent in a day by using the lamp for 6 hours = [Power*Time]/1000

= [23*6]/1000 kWh

= 138/1000 kWh

= 0.138 kWh

Energy spent in 105 days = [0.138*105] kWh

= 14.49 kWh

Total Cost = Rs. [14.49*0.8]

= Rs. 11.592

The Cost of Lamp after 105 days will be Rs. 11.592

I hope this helps.