The speed of the boat along the river is 10.8 km / h. The speed of the river is 4.1 km / h.

The speed of the boat along the river is 10.8 km / h. The speed of the river is 4.1 km / h. Find the speed of the boat against the current of the river and the boat’s own speed.

1) We find out what own speed the boat develops if we know that it moves along the river at a speed of 10.8 km / h, and the current speed is 4.1 km / h.

10.8 – 4.1 = 6.7 km / h.

2) Determine what speed the boat develops when going against the stream of the river, if we know that the speed of the river is 4.1 km / h, and we found out the boat’s own speed and it was 6.7 km / h.

6.7 – 4.1 = 2.6 km / h.

Answer: the boat’s own speed of movement was 6.7 km / h, and against the stream of the river, the boat moves at a speed of 2.6 km / h.