>Another good one, Hilmar!
BTW, this is the shortcut: 40 km/h x 1/2 h = 20 km.
Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)
