Question

2. Першу ділянка шляху поїзд пройшов за 2 год зі швидкістю 50 км/год, а решту шляху довжиною 240 км - за 3 год. Яку середню швидкість (в км/год) розвинув поїзд на всьому шляху? Обчислення вести в нестандартних одиницях.​

Answer 1

Ответ:

1)Найдем скорость на втором участке:

$S=v*t$ ⇒  $v=\dfrac{S}{t}$

$v=\dfrac{240}{3} = 80$ км/час.

2)Найдем среднюю скорость на всем пути:

$v_{sr}=\dfrac{50+80}{2+3} =\dfrac{130}{5} =26$ км/час

Объяснение:

Answer 2

Calculation of Average Speed

To calculate the average speed of the train over the entire distance, we can use the formula:

Average Speed = Total Distance / Total Time

In this case, the total distance is the sum of the two distances traveled, and the total time is the sum of the two times taken.

Let's calculate the average speed step by step:

1. Distance covered in the first part of the journey: 2 hours at a speed of 50 km/h. - Distance = Speed × Time - Distance = 50 km/h × 2 h = 100 km

2. Distance covered in the second part of the journey: 3 hours at an unknown speed. - Distance = Speed × Time - Distance = Unknown speed × 3 h = 240 km

Now, we can find the unknown speed in the second part of the journey:

3. Unknown speed in the second part of the journey: - Unknown speed = Distance / Time - Unknown speed = 240 km / 3 h = 80 km/h

4. Total distance traveled: - Total distance = Distance in the first part + Distance in the second part - Total distance = 100 km + 240 km = 340 km

5. Total time taken: - Total time = Time taken in the first part + Time taken in the second part - Total time = 2 h + 3 h = 5 h

Finally, we can calculate the average speed of the train over the entire distance:

Average Speed = Total Distance / Total Time Average Speed = 340 km / 5 h = 68 km/h

Therefore, the average speed of the train over the entire distance is 68 km/h.

Please note that the calculations were done using the given information and may not represent real-world scenarios.