Question

Поезд путь от одной станции до другой прошёл за 3,5 часов со скоростью 70 км/ч. С какой скоростью должен был бы идти поезд, чтобы пройти путь за 4,9 часов? На тему:прямая и пропорциональные зависимисти.

Answer 1

3,5*70=245км
245:4,9=50км/ч
Ответ:50км/ч

Answer 2

3,5 х 70 = 245 км.
Если поезд медленный, то его скорость будет 245 : 4,9 = 50 км/час

Answer 3

Finding the Speed of the Train

To find the speed at which the train should have traveled to cover the distance in 4.9 hours, we can use the concept of proportionality.

Let's denote the original speed of the train as x km/h. According to the given information, the train traveled a certain distance in 3.5 hours at a speed of 70 km/h. We can set up the following proportion:

70 km/h / 3.5 hours = x km/h / 4.9 hours

To solve for x, we can cross-multiply and then divide:

70 km/h * 4.9 hours = 3.5 hours * x km/h

343 km = 3.5x

x = 343 km / 3.5 hours

Calculating this, we find that the train should have traveled at a speed of approximately 98 km/h to cover the distance in 4.9 hours.