A truck uses 60-gallon fuel tank wants to travel to Cleveland, which is 480 miles away. The driver recognizes that the current engine, which can travel only 10 miles per gallon, will not get him there. By how many miles per gallon of fuel efficiency be improved to make the truck to Cleveland possible?  Choose the correct choice from the following answers:
A) 2	B) 6	C) 8	D) 5	E) 4
Actual miles/gallon is = 480/60= 
<gadget id="calculator">480/60</gadget>
<output>8</output>
8 miles/gallon.   Current engine miles/gallon is 10 miles/gallon.   Additional 2 miles/gallon is required to match the actual mileage.   2NSWER:2
<result>A</result>
A truck uses 60-gallon fuel tank wants to travel to Cleveland, which is 480 miles away. The driver recognizes that the current engine, which can travel only 10 miles per gallon, will not get him there. By how many miles per gallon of fuel efficiency be improved to make the truck to Cleveland possible?