Question

От пристани одновременно отошли два теплохода. Скорость одного в стоячей воде - 18 км/ч; а другого - 22 км/ч. На каком расстоянии друг от друга будут теплоходы через 3 ч, если они двигаются против течения реки, скорость которой равна 3 км/ч?Мне, только условие задачи (или чертёж), а решение не нужно!

Answer 1

U скор. S. t

1 теплоход - 18 км/ч
? через 3 ч
2 теплоход- 22км/ч
река. - 3км/ч.

Answer 2

Problem Statement

Два теплохода одновременно отошли от пристани. Скорость одного в стоячей воде составляет 18 км/ч, а другого - 22 км/ч. На каком расстоянии друг от друга будут теплоходы через 3 часа, если они двигаются против течения реки, скорость которой равна 3 км/ч?

Solution

To find the distance between the two boats after 3 hours, we need to consider their speeds and the time they have been traveling.

Let's assume that the distance between the boats at the start is D kilometers.

Boat 1 is moving at a speed of 18 km/h, and Boat 2 is moving at a speed of 22 km/h. However, they are both moving against the current of the river, which has a speed of 3 km/h.

After 3 hours, Boat 1 will have traveled a distance of 18 km/h * 3 h = 54 km against the current. Similarly, Boat 2 will have traveled a distance of 22 km/h * 3 h = 66 km against the current.

Since the boats are moving in opposite directions, the distance between them will be the sum of the distances they have traveled against the current. Therefore, the distance between the boats after 3 hours will be D + 54 km + 66 km.

However, we need to take into account the speed of the river current, which is 3 km/h. This means that the boats are effectively moving 3 km/h slower than their actual speeds.

So, the distance between the boats after 3 hours will be D + 54 km + 66 km - 3 km/h * 3 h.

To find the final distance between the boats, we need to substitute the given values into the equation and solve for D:

Final distance = D + 54 km + 66 km - 3 km/h * 3 h

Let's calculate the final distance:

Final distance = D + 54 km + 66 km - 3 km/h * 3 h Final distance = D + 54 km + 66 km - 9 km Final distance = D + 111 km - 9 km Final distance = D + 102 km

Therefore, the distance between the two boats after 3 hours will be D + 102 km.

Please note that the actual value of D is not provided in the problem statement, so we cannot determine the exact distance between the boats without that information.