Question

два поезда вышли из двух городов одновременно навстречу друг другу.один поезд шел со скоростью 63км в час , с какой скоростью шел второй поезд если расстояние между городами 564 км встретились поезда через 4 часа

Answer 1

Ответ:

Пошаговое объяснение:

Скорость 1 = 63 км/ч

Скорость 2 = х км/ч

(63 + х) * 4 = 564

63 + х = 564 : 4

63 + х = 141

х = 141 - 63

х = 78

Скорость 2 = (х) = 78 км/ч

1) 63 * 4 = 252 (км) - проехал 1 поезд за 4 часа

2) 564 - 252 = 312 (км) -

проехал 2 поезд за 4 часа

3) 312 : 4 = 78 (км/ч) - скорость 2 поезда

Ответ: 78 км/ч

Answer 2

Problem Analysis

We have two trains traveling towards each other from two different cities. The first train is traveling at a speed of 63 km/h. We need to find the speed of the second train if they meet after 4 hours and the distance between the cities is 564 km.

Solution

To find the speed of the second train, we can use the formula:

Distance = Speed x Time

Let's assume the speed of the second train is x km/h. The first train has been traveling for 4 hours at a speed of 63 km/h, so it has covered a distance of:

Distance of the first train = Speed of the first train x Time = 63 km/h x 4 hours = 252 km

Since the two trains meet, the sum of the distances covered by both trains should be equal to the total distance between the cities:

Distance of the first train + Distance of the second train = Total distance

Substituting the values we have:

252 km + Distance of the second train = 564 km

Now, we can solve for the distance of the second train:

Distance of the second train = Total distance - Distance of the first train = 564 km - 252 km = 312 km

Finally, we can use the formula to find the speed of the second train:

Speed of the second train = Distance of the second train / Time = 312 km / 4 hours = 78 km/h

Therefore, the second train was traveling at a speed of 78 km/h.

Answer

The second train was traveling at a speed of 78 km/h