A 100 watt electric bulb is lighted for 3 hrs daily and four 60 watt electric bulbs are lighted for 2h daily.Calculate the units of energy consumed in a month of 30 days.
Answers
Answer :
1. For 100W bulb
Electrical energy = Power x Time
=> 100W x 3h
=> 100/1000 kW x 3h
=> 0.1kW x 3h = 0.3kWh daily
=> 0.3kWh x 30 = 9kWh for 30 days
Therefore, 100W bulb = 9kWh....(1)
2. For one 60W bulb
Electrical energy = Power x Time
=> 60W x 2h
=> 60/1000kW x 2h = 0.12kWh daily
Therefore, four bulbs = 0.48kWh
=> 0.48kWh x 30 = 14.4kWh..... (2)
Total energy in a month = (1) + (2)
=> 9kWh + 14.4kWh = 23.4kWh
Therefore, the total energy consumed in a month is 23.4kWh or 23.4 units of energy.
Answer:
Answer :
1. For 100W bulb
Electrical energy = Power x Time
=> 100W x 3h
=> 100/1000 kW x 3h
=> 0.1kW x 3h = 0.3kWh daily
=> 0.3kWh x 30 = 9kWh for 30 days
Therefore, 100W bulb = 9kWh....(1)
2. For one 60W bulb
Electrical energy = Power x Time
=> 60W x 2h
=> 60/1000kW x 2h = 0.12kWh daily
Therefore, four bulbs = 0.48kWh
=> 0.48kWh x 30 = 14.4kWh..... (2)
Total energy in a month = (1) + (2)
=> 9kWh + 14.4kWh = 23.4kWh
Therefore, the total energy consumed in a month is 23.4kWh or 23.4 units of energy.