To solve this problem, you can use the formula for calculating distance when you have speed and time, which is distance = speed x time.
1. First, we'll take our average speed, which is 52 km/h.
2. Then, we'll multiply that by the time, which in this case is 7 hours. This is because for every hour, you're traveling 52 kilometers, and you do this for 7 hours.
3. So, 52 km/h x 7 h = 364 km.
4. Thus, your total distance traveled is 364 kilometers.
So, the correct answer is c. 364 km.