If the cost of gasoline is $2.50 per gallon, how far out of your way (one way) could you afford to drive (in miles) to a service station that has gaso­line at $2.25 per gallon if your vehicle gets 30 miles per gallon and you will fill up with 20 gallons of fuel? Consider only the cost of gaso­line in vehicle driving cost. (Hint: Since you are going out of your way, you have to drive back the same distance.)

What will be an ideal response?


Savings = 0.25(20) = $5.00
Cost/mile = 2.50/30 = $0.083/mile
Breakeven roundtrip = 5.00/0.083 = 60.24 miles
One way = 60.24/2 = 30.12 miles

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