The odometer starts off at 82,803.6 after the first filling
After the next filling, the odometer is now at 83,034.6
The difference in distances is
83,034.6 - 82,803.6 = 231
Therefore the car has traveled 231 miles on one tank (assuming the driver emptied the gas tank)
If that assumption is true, then driving 231 miles on 17.5 gallons yields a mpg rating of 231/17.5 = 13.2 which is a fairly lousy mpg rating for cars these days. Likely this isn't a car but a medium to large truck perhaps. A good mpg rating is more like 30 to 40 mpg.
Answer: 13.2 mpg (miles per gallon)
