The pilot of a small aircraft with a 40-gallon fuel tank wants to fly to Cleveland, which is 480 miles away. The pilot recognizes that the current engine, which can fly only 8 miles per gallon, will not get him there. By how many miles per gallon must the aircraft’s fuel efficiency be improved to make the flight to Cleveland possible?  Pick one:  A) 2  B) 4  C) 12  D) 40  E) 160
Actual miles/gallon is = 480/4 = 12 miles/gallon.   Current engine miles/gallon is 8 miles/gallon.   Additional 4 miles/gallon is required to match the actual mileage.   ANSWER:4
<result>B</result>
The pilot of a small aircraft with a 40-gallon fuel tank wants to fly to Cleveland, which is 480 miles away. The pilot recognizes that the current engine, which can fly only 8 miles per gallon, will not get him there. By how many miles per gallon must the aircraft’s fuel efficiency be improved to make the flight to Cleveland possible?