Question

Первую четверть пути мотоциклист двигался со скоростью 40км.ч оставшуюся часть пути со скоростью 60 км.ч чему равна средняя скорость мотоциклиста на всем пути

Answer 1

1)40*60:2=2400:2=1200 км/ч средняя скорость

Answer 2

Calculation of Average Speed

To calculate the average speed of the motorcyclist for the entire journey, we need to consider the distances traveled at each speed and the time taken for each segment.

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

The first quarter of the journey is covered at a speed of 40 km/h, which means the distance covered in this segment is D/4 kilometers.

The remaining three-quarters of the journey is covered at a speed of 60 km/h, which means the distance covered in this segment is 3D/4 kilometers.

To calculate the average speed, we need to find the total time taken for the entire journey. We can use the formula:

Average Speed = Total Distance / Total Time

The time taken for the first quarter of the journey can be calculated as:

Time taken for the first quarter = Distance / Speed = (D/4) / 40 = D/160 hours

The time taken for the remaining three-quarters of the journey can be calculated as:

Time taken for the remaining three-quarters = Distance / Speed = (3D/4) / 60 = D/80 hours

The total time taken for the entire journey is the sum of the times taken for each segment:

Total Time = Time taken for the first quarter + Time taken for the remaining three-quarters = D/160 + D/80 = (3D + 6D) / 480 = 9D / 480 = D / 53.33 hours

Now, we can calculate the average speed:

Average Speed = Total Distance / Total Time = D / (D / 53.33) = 53.33 km/h

Therefore, the average speed of the motorcyclist for the entire journey is 53.33 km/h.