Question

Одновременно от одной пристани в противоположных направлениях отошли два катера. Скорость катера, идущего по течению равна 15 км/ч. Какое расстояние будет между катерами через 4 ч.?

Answer 1

Если мы не берем скорость по течению и скорость против течения, то скорости одинаковые: 
4*(15+15)=120км

Я так думаю...
Может быть у кого то более ясное изъяснение будет.
Удачи.

Answer 2

Calculation of the Distance Between the Boats

To calculate the distance between the two boats after 4 hours, we need to consider the speed of the boat going against the current and the time elapsed.

Let's assume that the boat going against the current has a speed of x km/h.

The boat going with the current has a speed of 15 km/h.

After 4 hours, the boat going with the current will have traveled a distance of 15 km/h * 4 hours = 60 km.

The boat going against the current will have traveled a distance of x km/h * 4 hours = 4x km.

The total distance between the two boats after 4 hours will be the sum of the distances traveled by each boat.

So, the equation becomes:

60 km + 4x km = distance between the boats

To find the value of x and calculate the distance between the boats, we need more information or an additional equation.

Please provide any additional information or equations if available.