Question

Автобус ехал 3ч со скоростью 50 км ч затем он ехал 2 ч увеличив скорость на 20% найдите среднюю скорость?

Answer 1

(3*50+(50+0,2*50)*2):5=(150+120):5=270:5=54 км/ч

Answer 2

Calculation of Average Speed

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

The bus traveled for 3 hours at a speed of 50 km/h, covering a distance of 3 * 50 = 150 km.

Then, the bus traveled for 2 hours at a speed increased by 20%. To calculate the increased speed, we multiply the initial speed by 1.2 (1 + 20% = 1.2). So, the increased speed is 50 km/h * 1.2 = 60 km/h. The distance covered during this time is 2 * 60 = 120 km.

The total distance traveled by the bus is 150 km + 120 km = 270 km.

The total time taken is 3 hours + 2 hours = 5 hours.

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

Average Speed = Total Distance / Total Time

Average Speed = 270 km / 5 hours

Average Speed = 54 km/h

Therefore, the average speed of the bus is 54 km/h.