Question

средняя скорость: 5. Автобус половину всего времени ехал со скоростью 60 км/ч, а оставшееся время – со скоростью 90 км/ч. Какую часть всего пути он проехал с большей скоростью?​

Answer 1

Ответ:

вторую потому что 90 больше 60

Answer 2

Calculation of Distance Traveled at Different Speeds

To determine the portion of the total distance traveled at a higher speed, we need to calculate the distances traveled at each speed and compare them.

Let's assume that the total distance traveled is D.

The bus traveled the first half of the total time at a speed of 60 km/h and the remaining time at a speed of 90 km/h.

To calculate the distance traveled at 60 km/h, we can use the formula:

Distance at 60 km/h = Speed at 60 km/h * Time at 60 km/h

Similarly, to calculate the distance traveled at 90 km/h, we can use the formula:

Distance at 90 km/h = Speed at 90 km/h * Time at 90 km/h

Since the time spent at each speed is given as a fraction of the total time, we can calculate the distances traveled at each speed as follows:

Distance at 60 km/h = (60 km/h) * (0.5 * Total Time)

Distance at 90 km/h = (90 km/h) * (0.5 * Total Time)

To find the portion of the total distance traveled at a higher speed, we can compare the distances traveled at each speed:

Portion of Total Distance Traveled at Higher Speed = Distance at 90 km/h / Total Distance

Let's calculate the portion of the total distance traveled at a higher speed using the given information.

Calculation:

Given: - Average speed: 5 km/h - Time spent at 60 km/h: half of the total time - Time spent at 90 km/h: half of the total time

We can assume any value for the total distance, as it is not given in the question. Let's assume the total distance is 100 km.

Using the formulas mentioned above, we can calculate the distances traveled at each speed:

Distance at 60 km/h = (60 km/h) * (0.5 * Total Time) = 30 * Total Time

Distance at 90 km/h = (90 km/h) * (0.5 * Total Time) = 45 * Total Time

Now, let's calculate the portion of the total distance traveled at a higher speed:

Portion of Total Distance Traveled at Higher Speed = Distance at 90 km/h / Total Distance

Substituting the values:

Portion of Total Distance Traveled at Higher Speed = (45 * Total Time) / 100

Since the total distance is not given, we cannot calculate the exact portion of the total distance traveled at a higher speed without knowing the total distance.

Please provide the total distance traveled so that we can calculate the portion of the total distance traveled at a higher speed.