Question

Машина выехала из города А в город В, между которыми 100 км. Начал движение со скоростью 80 км/ч, на середине пути заглох мотор, ремонт занял 15 минут. После этого продолжил движение со скоростью 100 км/ч. Определите среднюю скорость машины на всем пути

Answer 1

80+20=100(км.ч)-общая скорость
55-15=40(км.ч)-расстояние
100-40=60(мин.)-время
Ответ: 60 минут,40 км расстояние 

Answer 2

80+20=100(км.ч)
55-15=40(км.ч)
100-40=60(мин.)

Answer 3

Calculating the Average Speed of the Car

To calculate the average speed of the car for the entire journey, we can use the formula:

Average Speed = Total Distance / Total Time

First, let's calculate the total time taken for the journey.

The car traveled at a speed of 80 km/h for the first part of the journey and 100 km/h for the second part after the repair.

The total distance of the journey is 100 km.

The time taken for the first part of the journey can be calculated using the formula:

Time = Distance / Speed

For the first part: - Distance = 50 km (half of the total distance) - Speed = 80 km/h

So, the time taken for the first part of the journey is: Time1 = 50 km / 80 km/h

After the repair, the car traveled at a speed of 100 km/h for the remaining half of the journey, which is also 50 km.

The time taken for the second part of the journey is: Time2 = 50 km / 100 km/h

The total time taken for the journey is: Total Time = Time1 + 15 minutes + Time2

Now, let's calculate the total time and then use it to find the average speed of the car for the entire journey.