Question

Автобус первые 4 км проехал со скоростью 20 км\ч, а следующие 12 км - со скоростью 40 км\ч. Чему равна средняя скорость автобуса на всем пути?

Answer 1

Общий путь:
S = 4+12=16 км
Общее время:
t = 4/20+12/40 = 4/20+6/20=10/20 = 0,5 ч

Средняя скорость:
V = S/t = 16/0,5 = 32 км/ч

Answer 2

32км/ч- средняя скорость

Answer 3

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 bus first traveled 4 km at a speed of 20 km/h, and then it traveled the next 12 km at a speed of 40 km/h.

To find the total distance traveled, we add the distances traveled at each speed: 4 km + 12 km = 16 km.

To find the total time taken, we divide the distances traveled at each speed by their respective speeds and add the results:

- Time taken for the first 4 km: 4 km / 20 km/h = 0.2 hours - Time taken for the next 12 km: 12 km / 40 km/h = 0.3 hours

The total time taken is 0.2 hours + 0.3 hours = 0.5 hours.

Now, we can calculate the average speed