If you stuck to that regime, I'd say about a month or two. Being more realistic though, if you lose a pound per week, then you are doing a good job. When losing weight, you expect it to be slow and steady - not much fun at all.
1 year
4 miles.
7
1,500 calories a day
1200 Calories
You need to lose 10 lbs at 3500 calories a pound.
zero
You can lose 120 calories depending on how fast you walk. I'm 15 and weigh 95 pounds so I would lose less :P. GOOD LUCK!
You could only eat about 2100 calories a day.
To lose a pound, no matter what weight you are, you need to burn 3500 calories.
It depends on how much you weigh, and how many calories are in your body in the first place.
About 1500 calories