An electric refrigerator rated 400 W operates 8 hourday What is the cost of the energy to operate it for 30 days at Rs 300 per kW h CBSE Physics
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## An electric refrigerator rated 400 W operates 8 hour/day. What is the cost of the energy to operate it for 30 days at Rs 3.00 per kW h? -CBSE Physics

By:milan-ransingh

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P=400
W=400/1000=0.4kW
T=8*30=240 hours.
electrical energy=P*t=0.4*240=96kWh
thus, electrical energy consumed by the refrigerator for 30 days is 96kWh
cost of 96kWh=96*3=288

13priya

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