Question

Два поезда идут навстречу друг другу со скоростью 385 км. первый поезд вышел на 2 часа раньше со скоростью 53 км. час. оезда встретились ерез 3 часа поле выхода второго поезда. найди скором второго поезда

Answer 1

1) 2+3=5 ч - был в пути первый поезд до встречи со вторым
2) 5*53=265 км - проехал первый поезд до встречи со вторым
3) 385-265=120 км - проехал второй поезд до встречи с первым
4) 120:3=40 км\ч - скорость первого поезда
ответ6 40 км\ч

Answer 2

Problem Analysis

We are given two trains traveling towards each other. The first train started 2 hours earlier than the second train and has a speed of 53 km/h. The trains meet after 3 hours of the second train's departure. We need to find the speed of the second train.

Solution

Let's assume the speed of the second train is x km/h.

The distance covered by the first train in 3 hours is 53 km/h * 3 hours = 159 km.

The distance covered by the second train in 3 hours is x km/h * 3 hours = 3x km.

Since the two trains are traveling towards each other, the sum of the distances covered by both trains should be equal to the total distance between them when they meet.

So, we can write the equation: 159 km + 3x km = total distance.

Now, let's find the total distance between the two trains.

The total time traveled by the first train is 3 hours + 2 hours = 5 hours.

The total distance traveled by the first train is 53 km/h * 5 hours = 265 km.

Therefore, the total distance between the two trains is 265 km.

Substituting this value into the equation, we get: 159 km + 3x km = 265 km.

Simplifying the equation, we have: 3x km = 265 km - 159 km.

Simplifying further, we get: 3x km = 106 km.

Finally, solving for x, we divide both sides of the equation by 3: x km = 106 km / 3.

Therefore, the speed of the second train is approximately 35.33 km/h.

Answer

The speed of the second train is approximately 35.33 km/h.