Question

Решение текстовых задач с помощью уравнений. Урок 4 Из пункта А по течению реки плыла лодка со скоростью 8 км/ч. Через 1 час 15 минут с этого места против течения реки начал двигаться катер со скоростью 18 км/ч. Через 1 час 45 минут после Отправления лодки их расстояние составило 29,5 км. Найди скорость течения реки. BILINI Сагс​

Answer 1

Ответ:

господи благослави мою

Answer 2

Solving the River Problem Using Equations

To solve the problem of finding the speed of the river, we can use the following equations:

1. Distance = Speed × Time 2. Speed of boat downstream = Speed of boat + Speed of river 3. Speed of boat upstream = Speed of boat - Speed of river

Let's proceed with solving the problem step by step.

Given Information

- Speed of the boat downstream (with the river) = 8 km/h - Speed of the boat upstream (against the river) = 18 km/h - Time taken for the boat and the motorboat to meet = 1 hour 45 minutes = 1.75 hours - Distance traveled when they met = 29.5 km

Calculating the Speed of the River

Let's denote the speed of the river as R.

Using the given information and the equations mentioned earlier, we can set up the following equations:

1. Equation 1: Distance traveled by the boat when the motorboat started = (8 km/h) × (1.25 hours) 2. Equation 2: Distance traveled by the motorboat when they met = (18 km/h) × (1.75 hours) 3. Equation 3: Total distance traveled when they met = Distance traveled by the boat + Distance traveled by the motorboat

By solving these equations, we can find the speed of the river.

Solution

1. Using Equation 1: Distance traveled by the boat when the motorboat started = (8 km/h) × (1.25 hours) = 10 km 2. Using Equation 2: Distance traveled by the motorboat when they met = (18 km/h) × (1.75 hours) = 31.5 km 3. Using Equation 3: Total distance traveled when they met = 10 km + 31.5 km = 41.5 km

Now, we can calculate the speed of the river using the total distance traveled when they met: - Total distance traveled = Distance traveled by the boat + Distance traveled by the motorboat - 41.5 km = (8 km/h) × (1.25 hours) + (18 km/h) × (1.75 hours) - 41.5 km = 10 km + 31.5 km - 41.5 km = 41.5 km

This means that the speed of the river is 0 km/h.

Conclusion

Based on the given information and the calculations, the speed of the river is 0 km/h. This result indicates that there is no speed of the river, which may indicate a potential issue with the given information or the problem setup.

If you have any further questions or need additional assistance, feel free to ask!