The speed of the boat against the river flow is 29.4 km / h. Find the speed of the boat downstream if the river speed is 2.5 km / h.

To solve the problem, you first need to determine the boat’s own speed.
To do this, add the speed of the river to the speed of the boat along the river.
In this case, we get:
29.4 + 2.5 = 31.9 km / h (Own speed of the boat.)

In order to determine the speed of the boat along the river, it is necessary to add the speed of the river to its speed.
We get:
31.9 + 2.5 = 34.4 km / h (Speed ​​of the boat along the river.)

In addition, the speed of the boat downstream of a river can be found by adding twice the speed of the current to the speed of the boat upstream.

29.4 + (2 * 2.5) = 29.4 + 5 = 34.4 km / h.