How much electricity could an elementary school save if for one hour every Friday for 32 weeks all the lights in the school were turned off?

Answer 1

To answer this question the total wattage of all the lights in the school must be added together. This total in watts will be in then changed to kilowatts by dividing by 1000. Take the kilowatts and multiply by the 32 hours that the lights would be shut off. Find out from the utility company what the school pays per kilowatt hour. Multiply that number by the answer you got when you multiplied the kilowatts by 32. This will give you the amount of money that would be saved by shutting the lights off for an hour for 32 weeks.