>That might be true where you live, but it's hardly a universal constant. I have not said it's a universal constant, it's true in the US, where we use miles. ~

>That might be true where you live, but it's hardly a universal constant. I have not said it's a universal constant, it's true in the US, where we use miles. ~1 hour per 100km is not as easy. I cannot say I care much if you are doubtful, especially if you live in Germany and not in the US, I doubt many people in the US will care about your doubts too.