Question

автомобиль 20км проехал со скоростью 70 км.ч. ещё 20 км со скоростью 105км. ч. Чему равна средняя скорость автомобиля на всем пути​

Answer 1

Ответ:

61км/ч

Объяснение:

Всего ав­то­мо­биль про­ехал: 120 + 75 + 110 = 305 (км), за­тра­тив на весь путь дробь, чис­ли­тель — 120, зна­ме­на­тель — 80 плюс дробь, чис­ли­тель — 75, зна­ме­на­тель — 50 плюс дробь, чис­ли­тель — 110, зна­ме­на­тель — 55 =5 (ч).

Таким об­ра­зом, сред­няя ско­рость: дробь, чис­ли­тель — 305, зна­ме­на­тель — 5 =61 (км/ч).

Ответ: 61 км/ч.

Answer 2

Ответ:

...........................................

Answer 3

Calculation of Average Speed

To calculate the average speed of the car, we need to find the total distance traveled and the total time taken.

The car traveled 20 km at a speed of 70 km/h and then an additional 20 km at a speed of 105 km/h.

Let's calculate the average speed step by step:

1. Calculate the time taken for the first part of the journey: - Distance: 20 km - Speed: 70 km/h - Time = Distance / Speed = 20 km / 70 km/h = 0.2857 hours

2. Calculate the time taken for the second part of the journey: - Distance: 20 km - Speed: 105 km/h - Time = Distance / Speed = 20 km / 105 km/h = 0.1905 hours

3. Calculate the total distance traveled: - Distance for the first part: 20 km - Distance for the second part: 20 km - Total distance = Distance for the first part + Distance for the second part = 20 km + 20 km = 40 km

4. Calculate the total time taken: - Time for the first part: 0.2857 hours - Time for the second part: 0.1905 hours - Total time = Time for the first part + Time for the second part = 0.2857 hours + 0.1905 hours = 0.4762 hours

5. Calculate the average speed: - Average speed = Total distance / Total time = 40 km / 0.4762 hours ≈ 84.03 km/h

Therefore, the average speed of the car for the entire journey is approximately 84.03 km/h.