Question

An electric train is moving north at 100mph and a wind is blowing to the west at 10mph. Which way does the smoke blow?

Answer 1

The smoke will be headed South-west. If the train is moving north, naturally the smoke will be going south. The wind coming from the west pushes the smoke moving south a bit west

Answer 2

are you on the train? if so it will blow south west, if not, north west.