We will have the following:
First, we transform to kilometer per hour, that is:
[tex]100\frac{mi}{h}\ast\frac{1.6km}{1mi}=160km/h[/tex]So, the velocity is 160 km/h.
Now, we can see that the car is traveling 160 km in 1 hour, thus it travels 320 km in 2 hours.