You'll find the attached formulas quite helpful.
Instead use WolframAlpha.com for math questions I would paste the answer but a cretinous fop has "disabled" that feature by javascript -- which is trivial to circumvent but I won't bother with the time.
It would take the car about 6 hours. 368 divided by 64, which equals 5.75, if rounded, would be 6.
It would cost $19.50. hope that helped