Question

первые 9 км автобус прошел со скоростью 36 км/ч а следующие 27 км со скоростью 54 км/ч какова средняя скорость автобуса ПОЖАЛУЙСТА ПОМОГИТЕЕЕЕ​

Answer 1

Ответ:

48 км/ч

Объяснение:

s1=9 км    v1=36 км/ч     s2=27 км     v2=54 км/ч    vcp=?

===

vcp=(s1+s2)/(t1+t2)

t1=s1/v1=9/36=0.25 ч

t2=s2/v2=27/54=0.5 ч

vcp=(9+27)/(0.25+0.5)=48 км/ч

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Answer 2

Calculation of Average Speed

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

The bus traveled the first 9 km at a speed of 36 km/h and the next 27 km at a speed of 54 km/h.

To find the total distance traveled, we add the distances covered in each segment: 9 km + 27 km = 36 km.

To find the total time taken, we divide the total distance by the average speed.

Let's calculate the average speed step by step:

1. Calculate the time taken for the first segment: - Distance: 9 km - Speed: 36 km/h - Time = Distance / Speed = 9 km / 36 km/h = 0.25 hours

2. Calculate the time taken for the second segment: - Distance: 27 km - Speed: 54 km/h - Time = Distance / Speed = 27 km / 54 km/h = 0.5 hours

3. Calculate the total time taken: - Total time = Time taken for the first segment + Time taken for the second segment = 0.25 hours + 0.5 hours = 0.75 hours

4. Calculate the average speed: - Average speed = Total distance / Total time = 36 km / 0.75 hours = 48 km/h

Therefore, the average speed of the bus is 48 km/h.

Please note that the sources provided do not contain relevant information for this calculation.