High School

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In a house, two 60-watt bulbs are lit for 4 hours each day, and three 100-watt bulbs are lit for 5 hours each day. Calculate the electric energy consumed in 30 days.

Answer :

Final answer:

To calculate the electric energy consumed in 30 days, we need to find the total energy consumed by each type of bulb and multiply it by the number of days. The total energy consumed is 1.98 kWh.

Explanation:

To calculate the electric energy consumed in 30 days, we need to find the total energy consumed by each type of bulb and multiply it by the number of days.

For the two 60 Watt bulbs, the energy consumed per bulb is 60 Watts x 4 hours = 240 Watt-hours.

So the total energy consumed by the two bulbs is 240 Watt-hours x 2 bulbs = 480 Watt-hours.

For the three 100 Watt bulbs, the energy consumed per bulb is 100 Watts x 5 hours = 500 Watt-hours.

So the total energy consumed by the three bulbs is 500 Watt-hours x 3 bulbs = 1500 Watt-hours.

To calculate the electric energy consumed in 30 days, we need to convert the energy consumed from Watt-hours to kilowatt-hours. 1 kilowatt-hour (kWh) is equal to 1000 Watt-hours.

So the total energy consumed in kilowatt-hours is (480 Watt-hours + 1500 Watt-hours) / 1000 = 1.98 kWh.

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