Answer :
Final answer:
The electric energy consumed in 30 days is 480 kWh. To calculate the electric energy consumed in 30 days, we need to calculate the energy consumed by each type of bulb and then multiply it by the number of days. The correct answer is a) 480 kWh.
Explanation:
To calculate the electric energy consumed in 30 days, we need to calculate the energy consumed by each type of bulb and then multiply it by the number of days.
For the two 60 W bulbs, the energy consumed in 4 hours is (2 bulbs) * (60 W/bulb) * (4 hours) = 480 Wh = 0.48 kWh.
For the three 100 W bulbs, the energy consumed in 5 hours is (3 bulbs) * (100 W/bulb) * (5 hours) = 1500 Wh = 1.5 kWh.
Now, we can calculate the total energy consumed in 30 days as (0.48 kWh + 1.5 kWh) * 30 days = 43.8 kWh.
Therefore, the correct answer is a) 480 kWh.
