Question 480805: Maria needed 8 gallons of gas to fill her car's gas tank. The mileage odometer read 34,000 miles. When the odometer read 34,240, when Maria filled the gas tank with 12 gallons. At the end of the trip she filled the tank with 16 gallons and the odometer read 34,576 miles. How many miles per gallon did she get the entire trip?
Thank you
Answer by Theo(13342)   (Show Source):
You can put this solution on YOUR website! when mileage reads 34,000, she fills the tank with 8 gallons.
when mileage reads 34,240, she fills the tank with 12 gallons.
when mileage reads 34,576, she fills the tank with 16 gallons.
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when mileage reads 34,000, she fills the tank with 8 gallons.
the 8 gallons is not counted for consumption during the trip because this is when the trip starts.
all she is doing is filling the tank to start the trip.
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when mileage reads 34,240, she fills the tank with 12 gallons.
gas mileage for this leg of the trip is 240/12 = 20 miles per gallon.
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when mileage reads 34,576, she fills the tank with 16 gallons.
gas mileage for this leg of the trip is 336/16 = 21 miles per gallon.
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she drove a total of 240 + 336 = 576 miles for the trip.
she consumed a total of 12 + 16 = 28 gallons.
gas mileage for the entire trip was 576/28 = 20.57142857 miles per gallon.
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