Assuming the car is using fuel at a constant rate (in reality cars don't) 60 minus 12 equals 48. Therefore 48 divided by 6 equals 8. The car uses 8 litres an hour.
Ooh, you're gonna HATE the grade you get on THIS homework assignment.
Really? Simple math here. I pity you.
The gas tank on a car holds 60 liters of gas. At the beginning of a 6-hour trip , the tank is full. At the end of the trip, it contains only 12 liters. What is the rate at which the car uses gas in liters per hour?