The speed of the river is 2 km / h. How many kilometers does the river carry the raft in 1 hour? for 5h?

The raft does not move with the help of external forces (it does not have a motor, etc.), therefore, if you do not take into account this and its own mass, the board’s own speed and its resistance are equal to zero, it is not taken into account.

The speed of the river flow is 2 km / h, which means that in an hour the river carries the raft for two kilometers. This is the answer to the first question.

To find out how many km the river will carry the raft in 5 hours, you need to multiply its speed by 5:

2 km / h * 5h = 10 km

Answer: 2 km, 10 km.