Question
If electricity costs say 5p (or 5 cents) per kilowatt/hour, how much does a conventional 100W light bulb cost to run in a year if it is left on permanently?
Answers
£43.80 (or $43.80 - a 365-day year - the calculation is: 0.05p x 0.1kw x 24hrs x 365days = 43.80)   Your Comment




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