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It depends on the cost of said petrol and the efficiency of the vehicle in "miles per unit of petrol". You didn't supply enough information.
From Cardiff to Glasgow is some 400 miles and would cost about £75 in petrol.
It would cost (2.4) times (the cost of one gallon petrol). Also, add cost of tolls, food, etc.
At 15 miles per gallon, 7 gallons of petrol.
Depends on the fuel mileage that the vehicle you are driving gets and the price of fuel along the way.
That is totally dependent on the price for the petrol and and the miles per gallon rating on the vehicle.
300 dollars
Considerably less for a motor scooter than for a battleship.
If you know how many km's you can travel per each litre of petrol, you can divide 580km's by km's per litre and then multiply by 2.50.
It depends on your car's mileage per gallon.
5.54
£10 approx dependent on the price of a liter at the time