Question

теплоход прошёл 70 км по реке за 2 часа и 90 км по озеру за 3 часа.С какой средней скоростью прошёл теплоход весь путь?

Answer 1

70+90=160км прошел теплоход
2+3=5 часов теплоход был в пути
160:5=32км/ч средняя скорость теплохода

Answer 2

Calculation of Average Speed

To calculate the average speed of the boat for the entire journey, we need to find the total distance traveled and the total time taken.

The boat traveled 70 km on the river in 2 hours and 90 km on the lake in 3 hours.

The total distance traveled is 70 km + 90 km = 160 km.

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

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

Average speed = Total distance / Total time = 160 km / 5 hours = 32 km/h.

Therefore, the average speed of the boat for the entire journey is 32 km/h.