Question

Автобус первую часть пути в 80ем прошел за 2 ч.Вторуб часть пути в 70км прошел за 1ч.С какой средней скоростью двигался автобус на всем пути?

Answer 1

Дано: S1=80 км , t1=2 ч.
S2=70 км, t2=1 час
V ср-?
V ср.= S1+S2 / t1+t2
V ср = (80+70) / (2+1) = 150/3 = 50 км/ч
Ответ: 50 км/ч

Answer 2

Calculation of Average Speed

To calculate the average speed of the bus for the entire journey, we need to find the total distance traveled and the total time taken.

The first part of the journey was completed in 2 hours at a speed of 80 km/h, covering a distance of 80 km.

The second part of the journey was completed in 1 hour at a speed of 70 km/h, covering a distance of 70 km.

To find the total distance traveled, we add the distances covered in both parts of the journey: 80 km + 70 km = 150 km.

To find the total time taken, we add the times taken for both parts of the journey: 2 hours + 1 hour = 3 hours.

Now, we can calculate the average speed by dividing the total distance by the total time:

Average Speed = Total Distance / Total Time

Average Speed = 150 km / 3 hours

Average Speed = 50 km/h

Therefore, the average speed of the bus for the entire journey is 50 km/h.