A 100 watt electric bulb is lighted for 5 hours daily and four 6 watt bulbs are lighted for 3hours daily. Calculate the energy consumed (in kWh) in a month of 30 days
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Energy = Power*time
Energy consumed by 100 W bulb per day = 2∗100 Wh
= 0.2 kWh
Energy consumed by 40 W bulbs per day = 4∗40∗4 Wh
= 0.64 kWh
Total energy consumed per day = 0.2 + 0.64 kWh
= 0.84 kWh
Therefore, the energy consumed in 30 days = 30∗0.84 kWh
= 25.2 kWh
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