The boat with its own speed of 19 km / h sailed against the current for 48 km in 3 hours. What is the speed of the river?

Moving evenly, the boat travels the same number of kilometers for each hour of movement.

Formula for determining the speed of uniform movement:

V = S / t;

V is the speed of movement;

S – distance traveled;

t – travel time.

The total speed of the boat is equal to the difference between its speed and the speed of the river flow.

Let’s find the general speed of the boat when it goes against the current:

V = 48 km / 3 hours = 16 km / h.

Find the speed of the river:

V = 19 km / h – 16 km / h = 3 km / h.

Answer: the river speed is 3 km / h.