KalKal
Superstar
That's a good pace, especially if you didn't train that much for the race. If you can do 10 at that pace, without a lot of training, you can definitely do 13.1. Time might be a lil' slower if you don't train enough, but you can definitely finish a half marathon.
I did finish the half marathon I ran in January. Its just that I was at the end. I started out too fast, and I misjudged how long 13 miles really was. My finishing time was just over 2:05, but the last mile took me 13 min. Then once I crossed the line I could barely even walk, and the race volunteers were coming up to me like "Are you OK?" .