Question

автобус ехал 3 часа со скоростью 50 километров в час затем ехал 2 часа увеличил скорость на 20% Найдите среднюю скорость автобуса

Answer 1

50:100=0,5. 0,5*20=10. 50+10=60. 60+10=70. 3+2=5. 70:5=14

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 at a speed of 50 kilometers per hour for 3 hours, covering a distance of 50 km/h * 3 h = 150 kilometers.

Then, the bus increased its speed by 20% and traveled at the new speed for 2 hours.

To calculate the new speed, we need to add 20% of the original speed to the original speed:

New speed = 50 km/h + (20% * 50 km/h) = 50 km/h + 10 km/h = 60 km/h.

The bus traveled at a speed of 60 kilometers per hour for 2 hours, covering a distance of 60 km/h * 2 h = 120 kilometers.

Now, we can calculate the total distance traveled:

Total distance = 150 km + 120 km = 270 kilometers.

To calculate the total time taken, we add the time taken for each leg of the journey:

Total time = 3 hours + 2 hours = 5 hours.

Finally, we can calculate the average speed using the formula:

Average speed = Total distance / Total time = 270 km / 5 h = 54 kilometers per hour.

Therefore, the average speed of the bus is 54 kilometers per hour.