A 100 Watt bulb is lighted for 2 hours daily and five 40 Watt tubes are lighted for 4 hours everyday. Calculate the total energy consumed ?
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A 100 w electric bulb is lighted for 2 hrs daily and four 40w bulbs are lighted for 4 hrs daily .calculate the energy consumed(in Kwh)in 30 days Answer: Energy consumed by electric bulb = power of the bulb ⨯ Time Energy consumed by electric bulb of 100 w = 100 w ⨯ 30 ⨯ 2 hrs Energy consumed by electric bulb of 100 w = 3000 watt-Hour Energy consumed by electric bulb of 100 w = 3 kilo watt-Hour Energy consumed by four bulbs each of 40 w = Number of the bulbs ⨯ power of each bulb ⨯ Time Energy consumed by four bulbs each of 40 w = 4 ⨯ 40 w ⨯ 4 hrs ⨯30 Energy consumed by four bulbs each of 40 w = 19200 watt - Hour Energy consumed by four bulbs each of 40 w = 19.2 kilowatt – Hour Total energy consumed = Energy consumed by electric bulb of 100 w + Energy consumed by four bulbs each of 40 w Total energy consumed = 3 kilo watt-Hour + 19.2 kilowatt – Hour Total energy consumed = 22.2 kilo watt-Hour
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