Question

Два поезда идут навстречу друг другу с двух станций, расстояниемежду которыми 385км.Первый вышел раньше на 2 часа и движется со скоростью 53км/ч.Через 3 часа после выхода второго поезда они встретились.Какова скоростьвторого поезда?помогите срочно!!!

Answer 1

1. 53*2=106
2. 385-106=279
3. 279/(53+X)=3
3X=120
X=40 (КМ/Ч)- скорость второго

Answer 2

Problem Analysis

We have two trains traveling towards each other from two different stations. The distance between the stations is 385 km. The first train started 2 hours earlier and is moving at a speed of 53 km/h. The second train started 3 hours after the first train. We need to find the speed of the second train.

Solution

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

Speed = Distance / Time

Let's calculate the time it took for the trains to meet.

The first train started 2 hours earlier and traveled for 3 hours before meeting the second train. So, the total time traveled by the first train is 2 + 3 = 5 hours.

Now, let's calculate the distance traveled by the first train using the formula:

Distance = Speed * Time

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

Since the two trains meet, the sum of the distances traveled by both trains should be equal to the total distance between the stations, which is 385 km.

Let's calculate the distance traveled by the second train:

Distance traveled by the second train = Total distance - Distance traveled by the first train

Distance traveled by the second train = 385 km - 265 km = 120 km.

Now, we can calculate the speed of the second train using the formula:

Speed = Distance / Time

Speed of the second train = 120 km / 3 hours = 40 km/h.

Therefore, the speed of the second train is 40 km/h.

Answer

The speed of the second train is 40 km/h.