Question

Автомобиль ехал 3 ч со скоростью 85 км/ч, следующие 2 ч он снизил скорость на 15 км/ч, а в последние 4 ч увеличил её до 90 км/ч. Какое расстояние проехал автомобиль за всё время движения?

Answer 1

1.расстояние = скорость*врея, следовательно 3*85+2*15 + 4*90=645км

 

Answer 2

Calculation of the Distance Traveled by the Car

To calculate the distance traveled by the car, we need to consider the different time intervals and speeds at which it was traveling.

1. The car traveled for 3 hours at a speed of 85 km/h. 2. Then, it traveled for 2 hours at a reduced speed of 85 km/h - 15 km/h = 70 km/h. 3. Finally, it traveled for 4 hours at an increased speed of 90 km/h.

To calculate the distance traveled during each time interval, we can use the formula:

Distance = Speed × Time

Let's calculate the distance traveled during each interval:

1. Distance traveled in the first 3 hours: - Speed = 85 km/h - Time = 3 hours - Distance = 85 km/h × 3 hours = 255 km

2. Distance traveled in the next 2 hours: - Speed = 70 km/h - Time = 2 hours - Distance = 70 km/h × 2 hours = 140 km

3. Distance traveled in the last 4 hours: - Speed = 90 km/h - Time = 4 hours - Distance = 90 km/h × 4 hours = 360 km

Now, let's calculate the total distance traveled by adding up the distances from each interval:

Total distance = Distance in the first 3 hours + Distance in the next 2 hours + Distance in the last 4 hours = 255 km + 140 km + 360 km = 755 km

Therefore, the car traveled a total distance of 755 km during the entire journey.