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 How much will you pay a month at Php 1.50 perr kilowatt-hour, if you leave a 25 watt electric bulb lighted every night from 8:00 pmto 5:00 am?

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Elgeodizonviz
Php 405... he/she used 9 hrs. per night and 1 month consist of 30 days so,
                
               = 9 x 1.50
               = 13.50
               = 13.50 x 30
               = 405



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