A factory has 5 220 volt, 10 watt bulbs. Bulbs burn at the rate of 6 hours per day for 30 days. If the value of electric energy is 5 per unit, find
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E=Power(inkW)×time=
1000
4×100×6
kWh=2.4kWh
Consumed in 30 days=30×2.4=72
Total cost =72×5=360Rs
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