Question

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

Answer 1

Первый участок 3*85=255 км
Второй 2*(85-15)=2*70=140 км
Третий 4*90=360 км
Итого 255+140+360=755 км

Answer 2

Calculation of Distance Traveled

To calculate the total distance traveled by the car, we need to calculate the distance traveled during each segment of the journey and then sum them up.

1. Segment 1: The car traveled for 3 hours at a speed of 85 km/h. - Distance = Speed × Time = 85 km/h × 3 h = 255 km. 2. Segment 2: The car traveled for 2 hours at a reduced speed of 70 km/h (85 km/h - 15 km/h). - Distance = Speed × Time = 70 km/h × 2 h = 140 km. 3. Segment 3: The car traveled for the last 4 hours at an increased speed of 90 km/h. - Distance = Speed × Time = 90 km/h × 4 h = 360 km. Now, we can calculate the total distance traveled by summing up the distances from each segment: Total Distance = Distance Segment 1 + Distance Segment 2 + Distance Segment 3 Total Distance = 255 km + 140 km + 360 km = 755 km.

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