Question

Решите задачу Автомобиль ехал 3 часа СО СКОРОСТЬЮ 56,4 км/ч И 4 ЧАСА СО СКОРОСТЬЮ 62,7 КМ/Ч НАЙДИТЕ СРЕДНЮЮ СКОРОСТЬ АВТОМОБИЛЯ НА ВСЁМ ПУТИ

Answer 1

S(расстояние)=3*56.4+4*62.7=420 км
V(средняя скорость)=420 / 7= 60 км/ч
т.к. Расстояние = скорость * время
 Скорость= расстояние / время

Answer 2

Problem:

We are given that a car traveled at a speed of 56.4 km/h for 3 hours and at a speed of 62.7 km/h for 4 hours. We need to find the average speed of the car for the entire journey.

Solution:

To find the average speed, we can use the formula:

Average Speed = Total Distance / Total Time

To calculate the total distance, we need to find the distance traveled at each speed and then add them together.

Let's calculate the distance traveled at a speed of 56.4 km/h for 3 hours: Distance1 = Speed1 * Time1

Distance1 = 56.4 km/h * 3 hours

Now, let's calculate the distance traveled at a speed of 62.7 km/h for 4 hours: Distance2 = Speed2 * Time2

Distance2 = 62.7 km/h * 4 hours

Finally, we can find the total distance by adding Distance1 and Distance2: Total Distance = Distance1 + Distance2

Now that we have the total distance and the total time, we can calculate the average speed using the formula mentioned earlier.

Let's calculate the average speed:

Average Speed = Total Distance / Total Time

Now, let's substitute the values and calculate the average speed.

Calculation:

Distance1 = 56.4 km/h * 3 hours = 169.2 km Distance2 = 62.7 km/h * 4 hours = 250.8 km Total Distance = Distance1 + Distance2 = 169.2 km + 250.8 km = 420 km Total Time = 3 hours + 4 hours = 7 hours

Average Speed = Total Distance / Total Time = 420 km / 7 hours = 60 km/h

Answer:

The average speed of the car for the entire journey is 60 km/h.

Please note that the answer is based on the given information and calculations.