This depends on how many miles to the litre the car uses. You may wish to find out what this is for the particular make and model before trying to work it out.
Every car will be different and use various amounts of fuel dependant on it's engine size, how fast it is driven, traffic, etc etc.
Depending on driving conditions - about 2.5 gallons.
It depends on the fuel efficiency of your vehicle, your driving style and road conditions.
between a third and two thirds of a gallon depending on the miles per gallon of your car.
In an average car, you would need about six liters of petrol to drive 38 miles. This is equal to about 1.5 US gallons.
You will need to know the rate of fuel consumption to answer that question.
Depends on the car...
At 20 mpg, it will take about 6 gallons of gas.
you need to use 30 litres of petrol if you are going from Aberdeen to Glasgow
45 miles per gallon
Depends on the fuel mileage of the vehicle in question.
Find out the total number of miles you will travel. You need to know the number of miles you get per gallon of gas for your particular car. Then divide the miles per gallon into the total miles you will travel. That will tell you how many gallons of gas you will need. It will still be fairly approximate depending on how fast you travel and the conditions of the road.
You will need to travel at an average of 25 miles ÷ 2 hours = 121/2 mph.