Each log burns for half an hour (0.5 hours). If the skier starts with 10 logs, we can calculate the total burn time by multiplying the number of logs by the burn time of each log:
\[ 10 \text{ logs} \times 0.5 \text{ hours/log} = 5 \text{ hours} \]
Therefore, the fire could burn for a total of 5 hours.