Question

Мотоциклист за первые 10 минут движения проехал путь 5 км, а за следующие 8 мин 9,6 км .какова средняя скорость движения мотоциклиста на всем пути?

Answer 1

1 участок

Скорость 1= s1/t1=5 км / 10 мин = 0,5 км/ч

Скорость 2=s2/t2= 9,6 км/ 8 мин = 1,2 км/ч

Ср скорость= ( s1+s2)/(t1 +t2)=0,8 км/ч

Answer 2

Calculation of Average Speed

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

According to the given information: - In the first 10 minutes, the motorcyclist traveled a distance of 5 km. - In the next 8 minutes, the motorcyclist traveled a distance of 9.6 km.

To find the total distance traveled, we add the distances covered in the first 10 minutes and the next 8 minutes: 5 km + 9.6 km = 14.6 km

To find the total time taken, we add the time taken in the first 10 minutes and the next 8 minutes: 10 minutes + 8 minutes = 18 minutes

Now, we can calculate the average speed using the formula: Average Speed = Total Distance / Total Time

Substituting the values: Average Speed = 14.6 km / 18 minutes

To convert the average speed to km/h, we need to divide the distance by the time in hours. Since the given time is in minutes, we need to convert it to hours by dividing it by 60: Average Speed = 14.6 km / (18 minutes / 60 minutes/hour)

Simplifying the expression: Average Speed = 14.6 km / (18/60) hour Average Speed = 14.6 km / (0.3) hour Average Speed = 48.67 km/h

Therefore, the average speed of the motorcyclist for the entire journey is 48.67 km/h.