In the first hour, the plane flew seven-twelfths, and in the second, the remaining 630 km. To find the length of the route.

In this problem, the entire path that the plane flew can be represented as an ordinary fraction – 13/13. Based on the condition of the problem, it is known that in the first hour the plane flew 7/13 of the way. Therefore, we can find out how much the plane flew in the second hour:
13/13 – 7/13 = 6/13 ways.
Since the entire path is divided into 13 equal segments, we can find what such a segment is equal to:
6/13 = 630 km
1/13 = 630: 6 = 105 km.
Now we find the distance in kilometers that the plane flew in 1 hour:
105 * 7 = 735 km.
We find the total distance in two hours:
735 + 630 = 1365 km.
Answer: the plane has flown 1365 km in total.