Question

Первые 9км автобус прошел со скоростью 36 км/ч, а следующие 27 км- со скоростью 54 км/ч.Какова средняя скорость автобуса?

Answer 1

Автобус прошел всего 9+27=36 км;
затратил время: 9/36=0,25 часа и 27/54=0,5 часа, 0,25+0,5=0,75 часа;
средняя скорость 36/0,75=48 км/час.

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, we add the distances traveled at each speed: 9 km + 27 km = 36 km.

To find the total time, we divide the distance by the speed at each segment and add the results: (9 km / 36 km/h) + (27 km / 54 km/h) = 0.25 hours + 0.5 hours = 0.75 hours.

Now, we can calculate the average speed by dividing the total distance by the total time: 36 km / 0.75 hours = 48 km/h.