Answer:
21 mpg
Step-by-step explanation:
So the distance in miles that his car could cover within gas fill up is the difference in odometer reading
d = 54008 - 53762 = 246 miles
So if it takes 11.8 gallons of gas to cover 246 miles then his mile per gallon can be calculated as
246 / 11.8 = 20.85 mpg