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Loppyfoot
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Homework Statement
Bob is deciding whether to buy Car A which is $4000 and 20mpg, or Car B which is $5500 and 30mpg. Bob guesstimates that the gas will be about $1.25 per gallon. Repair costs will not factor into this problem. How many miles would Bob need to drive, before Car B becomes the better buy?
Homework Equations
The Attempt at a Solution
Well, I thought about subtracting 5500-4000 to get $1500. I guessed that this would be the amount that Bob would have to make-up. So if Car B drives 100 miles, and the car gets 30mpg, I calculated that the total gas would cost $4.16. So I made a proportion:
100 = X
$4.16 $1500
So, 4.16X = 150,000
X=150,000/4.16
X=36057miles
I got 36,057 miles. Is this correct? Is there another way to complete this problem? This section of my chapter is velocity, position, and time.
Thanks