As we know that kinetic energy is given by formula
[tex]K = \frac{1}{2} mv^2[/tex]
here
m = mass of the object
v = speed of the object
now we can plug in the values of mass and speed in the above formula
[tex]K = \frac{1}{2}*600*12^2[/tex]
[tex]K = 300*144[/tex]
[tex]K = 43200 J]/tex]
so kinetic energy of the car is 43200 J