A $100 W$ electric bulb is lighted for 2 hrs daily and four $40$ Watt bulbs are lighted for 4 hrs everyday. Calculate the energy consumed in kWh in 30 days.

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Solution

Energy = Powertime
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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A 100W electric bulb is lighted for 2 hrs daily and four 40 Watt bulbs are lighted for 4 hrs everyday. Calculate the energy consumed in kWh in 30 days.

Energy = Power*timeEnergy consumed by 100 W bulb per day = 2∗100 Wh = 0.2 kWhEnergy consumed by 40 W bulbs per day = 4∗40∗4 Wh = 0.64 kWhTotal 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

A $100 W$ electric bulb is lighted for 2 hrs daily and four $40$ Watt bulbs are lighted for 4 hrs everyday. Calculate the energy consumed in kWh in 30 days.

Energy = Powertime
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