Question

Пароход шёл 3 часа со скоростью 28 км/ч и 4 часа со скоростью 35 км/ч. Чему была равна средняя скорость за это время?

Answer 1

28*3+35*4=224 - общее расстояние 224:(3+4)= 32км/час

Answer 2

Calculation of Average Speed

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

Let's break down the information given:

- The ship traveled for 3 hours at a speed of 28 km/h. - The ship also traveled for 4 hours at a speed of 35 km/h.

To find the total distance traveled, we can add the distances traveled at each speed:

Distance traveled at 28 km/h = 28 km/h * 3 hours = 84 km Distance traveled at 35 km/h = 35 km/h * 4 hours = 140 km

The total distance traveled is 84 km + 140 km = 224 km.

To find the total time taken, we can add the times taken at each speed:

Total time taken = 3 hours + 4 hours = 7 hours.

Now, we can calculate the average speed by dividing the total distance traveled by the total time taken:

Average speed = Total distance traveled / Total time taken = 224 km / 7 hours = 32 km/h.

Therefore, the average speed for the entire journey was 32 km/h.

Please note that the sources provided did not contain specific information related to this question. The calculation was done based on the given information and general mathematical principles.