Question

Почтовый поезд прошёл расстояние между двумя городами за8 ч со скоростью 60км/ч .За сколько часов пройдёт это расстояние скорый поезд ,если его скорость на 20км/ч больше скорости почтового поезда

Answer 1

1)60*8=480(км)-весь путь.
2)60+20=80(км/ч)-скорость второго поезда.
3)480:80=8(ч)
Ответ: за 8 часов.

Answer 2

60*8=480(км) расстояние между городами
60+20=80(км/ч) скорость скорого поезда
480÷80=6(ч)

ответ: за 6 часов скорый поезд пройдет это расстояние

Answer 3

Calculation of Time for the Express Train to Cover the Distance

To calculate the time it takes for the express train to cover the distance between the two cities, we need to consider the speed of the express train and the distance itself.

Given: - The postal train covers the distance between the two cities in 8 hours at a speed of 60 km/h. - The express train has a speed that is 20 km/h faster than the speed of the postal train.

To find the time it takes for the express train to cover the same distance, we can use the formula:

Time = Distance / Speed

Let's calculate the time for the express train:

1. Calculate the distance covered by the postal train: - Distance = Speed * Time - Distance = 60 km/h * 8 hours - Distance = 480 km

2. Calculate the speed of the express train: - Speed of the express train = Speed of the postal train + 20 km/h - Speed of the express train = 60 km/h + 20 km/h - Speed of the express train = 80 km/h

3. Calculate the time for the express train to cover the distance: - Time = Distance / Speed - Time = 480 km / 80 km/h - Time = 6 hours

Therefore, the express train will cover the distance between the two cities in 6 hours.