If you want to find out the width of country, which one would be more idiomatic:
1- How far across is France?
2- How long is it from the westernmost to the easternmost of France?
Or is there any other practical way to say it?
And another question: Does the structure "how far across" asks about the same thing (the width) for a country like the Sweden or does it mean from the northernmost to the southermost point of it, because it is bigger if you measure it lengthwise?