Answer :
Final answer:
The electric energy consumed in 30 days is 0.74 kWh.
Explanation:
To calculate the electric energy consumed in 30 days, we need to find the energy consumed by each bulb and then calculate the total energy.
For the two 60 W bulbs, the energy consumed in 4 hours is:
E = Power × Time = 60 W × 4 hours = 240 Wh
For the three 100 W bulbs, the energy consumed in 5 hours is:
E = Power × Time = 100 W × 5 hours = 500 Wh
Now, to calculate the total energy consumed, we add the energy of the two types of bulbs:
Total Energy = Energy of 60 W bulbs + Energy of 100 W bulbs
Total Energy = 240 Wh + 500 Wh = 740 Wh
In 30 days, there are 30 × 24 = 720 hours.
To convert the energy from watt-hours to kilowatt-hours, we divide by 1000:
Total Energy = 740 Wh / 1000 = 0.74 kWh
Therefore, the electric energy consumed in 30 days is 0.74 kWh.
