An electric refrigerator rated 200w operated in hour/day. What is the cost of the energy to operate it for 30 days at Rs.4.00 per kwh?
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refrigerator =200/1000*1=0.2kwh
total energy in one day=0.2kwh
in 30 days=0.2*30=6
energy to operate it for 30 days at Rs 4.00=6*4.00=24.00
Answered by
1
Answer:
Given, Power = 200 W
time= 1 hour per day, for 30 days
= 30*1=30 hours
energy= power *time.
= 200*30
= 6000W hour.
but commercial unit of energy is kilowatt hour. so we need to convert our answer into kWh.
= 6000/1000= 6 kWh since 1W= 1/1000KWh
given 4 rs per kWh
thus cost is 4 * 6= 24 rupees
24 rs
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