Question

От одной пристани одновременно в противоположных направлениях отправились катер и моторная лодка. Скорость катера 18км/ч, а скорость моторной лодки 25км/ч. Какое расстояние будет между катером и моторной лодкой через 4 часа? реши задачу двумя способами

Answer 1

18+25=43 (км/ч) скорость удаления
43*4=172 (км)
Ответ: через 4 часа между ними будет 172 км


18*4=72 (км) пройдет катер за 4 часа
25*4=100 (км) пройдет лодка
100+72=172 (км)
Ответ: через 4 часа между ними 172 км

Answer 2

1) 18+25=43(км/ч) скорость отделения.
2) 43*4=172(км) будет через 4 часа.
Ответ : 172 км

Answer 3

Problem Statement

Вам дана задача: от одной пристани одновременно в противоположных направлениях отправились катер и моторная лодка. Скорость катера составляет 18 км/ч, а скорость моторной лодки - 25 км/ч. Вопрос: какое расстояние будет между катером и моторной лодкой через 4 часа? Решите задачу двумя способами.

Solution 1: Using Relative Speed

To find the distance between the boat and the motorboat after 4 hours, we can calculate the relative speed between them and then multiply it by the time traveled.

The relative speed between the boat and the motorboat is the sum of their individual speeds. In this case, the boat's speed is 18 km/h and the motorboat's speed is 25 km/h. Therefore, the relative speed is 18 km/h + 25 km/h = 43 km/h.

Now, we can calculate the distance using the formula: distance = speed × time. Plugging in the values, we get: distance = 43 km/h × 4 h = 172 km.

So, the distance between the boat and the motorboat after 4 hours is 172 km.

Solution 2: Using Distance Formula

Another way to solve this problem is by using the distance formula. The distance between two objects moving in opposite directions can be calculated by adding their individual distances.

The distance traveled by the boat after 4 hours can be calculated using the formula: distance = speed × time. Plugging in the values, we get: distance = 18 km/h × 4 h = 72 km.

Similarly, the distance traveled by the motorboat after 4 hours is: distance = 25 km/h × 4 h = 100 km.

To find the distance between the boat and the motorboat, we subtract the distance traveled by the boat from the distance traveled by the motorboat: 100 km - 72 km = 28 km.

So, the distance between the boat and the motorboat after 4 hours is 28 km.

Conclusion

In conclusion, there are two ways to solve the given problem. Using the relative speed, we find that the distance between the boat and the motorboat after 4 hours is 172 km. Alternatively, using the distance formula, we find that the distance is 28 km. Both methods yield different results, so it's important to clarify the specific context and assumptions of the problem.