Question: How long do you have to walk to burn off 100 calories?
Option 0: Walking at about a mile every 15 minutes, you would walk for 30 minutes, or 2 miles. An easy way to remember is to walk one mile in any direction, and then just walk back in some other  direction.
Option 1: Walking at about a mile every 15 minutes, you would walk for 30 minutes, or 2 miles. An easy way to remember is to walk one mile in any direction, and then just walk back in the opposite direction.
Answer: 1