Answer:
1 hour
Step-by-step explanation:
Well if the wind is blowing in his face 4 miles per hour and pushing him home 4 miles per hour then the wind pushing him home would make up for the time lost by the wind blowing in Ted's face because the wind was going at the same speed both times.
Note: My answer assumes that the ground was flat. If it was not flat but slanted like a hill, then this answer would be incorrect.