The speed of the river is 49/9 km. how far the raft will travel along the river in 8/5 hours.

We will take into account that the speed indicated in the condition should be measured in km / h.

Let us find out how many kilometers the distance will be determined, that the raft will have time to swim in 8/5 hours, when from the condition of the task we know that the speed of the river is 49/9 km / h:

49/9 * 8/5 = 392/45 = 8.7 (1).

Answer: With such initial data, the raft will cover a distance of 8.7 (1) kilometer in 8/5 hours.