Question

suppose in a house there are four bulbs of 100 W each, four of 60 W each and
six of 10 W each. All of them are used for five hours a day. How many units
of electricity will be used up in 30 days ? How much will they have to pay at RS3/- per unit

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Answer 1

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