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A 120 watt light bulb uses about 0.1 kilowatt of electricity per hour. if electricity costs 0.20$ per kilowatt hour, how much does it cost to have the bulb on for an hour?
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A 120 watt light bulb uses about 0.1 kilowatt of electricity per hour. if electricity costs 0.20$ per kilowatt hour, how much does it cost to have the bulb on for an hour?

User Andrew Basile
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1 Answer

2 votes
It will cost .20 * .1 = .02 cent an hour
User Akshansh Thakur
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