The speed of the boat along the river is 27 1/3 km / h, and the speed

The speed of the boat along the river is 27 1/3 km / h, and the speed of the current is 1 4/9 km / h. Find your own boat speed upstream of the river.

To solve the problem, you first need to determine the boat’s own speed.
To do this, subtract the speed of the river from the speed of the boat along the river.
In this case, we get:
27 1/3 – 1 4/9 = (Converting to an incorrect fraction) = 246/9 – 13/9 = 233/9 = 25 8/9 km / h.
In order to determine the speed of the boat against the stream of the river, it is necessary to subtract the speed of the river from its own speed.
We get:
25 8/9 – 1 4/9 = 233/9 – 13/9 = 220/9 = 24 4/9 km / h.
Answer: 24 4/9 km / h.