Ethanol blended with gasoline can be used to power a flex fueled car. One partic

Question

Ethanol blended with gasoline can be used to power a flex fueled car. One particular blend that is gaining in popularity is E 85, which is 85% ethanol and 15% gasoline. E 85 is 80% cleaner burning than gasoline alone, and it reduces our dependency on foreign oil. But a flex fueled car cost $811 more than a conventional gasoline fueled car additionally, E 85 fuel gets 10% less miles per gallon than a gasoline only. Consider 100% gasoline fueled car that averages 30 miles per gallon and a E 85 fueled car will average about 27 miles per gallon. If either car will be driven 90,000 miles before being traded in, how much will be E 85 fuel have to cost (per gallon) to make the flex field car as economically attractive as a conventional gasoline fueled car? Gasoline cost $3.11 per gallon. Work this problem without considering the time value of money. Provide answer precision to the nearest cent.

Explanation / Answer

Pick Up Sticks Pizza

Shape square with side =15 inch and thickness = 1.25 inch

Volume = 15*15*1.25 = 281.25 in3

Cost = 15(1+0.05) +1.5 = 17.25$

Cost/ cubic inch = Cost/Volume = 0.06 $/in3

Fred's Pizza

Shape circlular with radius = 12 inch, thickness =1.75 inch

Volume = pi*12*12*1.75 = 791.68 in3

Cost = 17.25(1+0.05) + 0= 18.1125$

Cost/ cubic inch = Cost/Volume = 18.1125/791.68 = 0.02$/in3

So, clearly Fred's Pizza is cheap alternative

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