An Airbus 320 aircraft with a total mass of 78 tons makes a takeoff roll of 0 to 250 km/h on a 2 km track. The overall efficiency of the aircraft is known to be 35%. 1) If the calorific value of the fuel is 45 MJ/L, how much fuel consumes without passengers on takeoff? 2) What will be the kinetic energy when it has consumed 1 liter of fuel?