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Mathematics 20 Online
OpenStudy (anonymous):

The excavator at the mine uses a gallon of gas every 3 minutes. The truck uses a gallon of gas every 6 minutes. How long will 100 gallons of gas last if both machines are being used?

OpenStudy (valpey):

Turn it into gallons per minute.

OpenStudy (valpey):

1/3 gpm + 1/6 gpm = 1/2 of a gallon per minute. 200 minutes to get through 100 gallons.

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