A shop has 5 bulbs of 100 W each. All of them are used for 7 hours a day. How many units of energy is consumed in 3 days?
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Power of each bulb= 100 W
in Kilo watt= 100/1000= 0.1 kW
time consumed= 7 hours
energy consumed by each bulb in one day= 0.1kW×7h = 0.7kWh
energy consumed by 5 bulbs = 0.7kWh×5= 3.5kWh
energy consumed in 3 days = 3.5kWh×3= 10.5 kWh or 10.5 units
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