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12 June, 20:58

A generator contains 60 gallons of fuel and uses 2.5 gallons per hour. A more efficient power generator contains 40 gallons of fuel and uses 1.5 gallond per hour. After how many hours do the generators have the same amount of fuel? Which generator runs longer? Justify your answers

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  1. 12 June, 21:59
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    After how many hours do the generators have the same amount of fuel?

    60 - 2.5x = 40 - 1.5x - -> x = 20 hours

    Which generator runs longer?

    60/2.5 = 24 hours

    40/1.5 = 26 2/3 hours

    The more efficient power generator runs 2 2/3 hours longer.
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