Question

Решите задачу с решениямииз двух городов расстояние мужду которыми 777 метров вышли навстречу друг другу два поезда первый поезд вышел на 3 часа раньше и шёл со скоростью 75 км/ч поезда встретились через 4 часа после выхода второго поезда с какой скоростью шёл второй поезд

Answer 1

1)3+4=7 часов всего шел первый поезд
2) 7*75=525 км всего прошёл первый поезд
3) 777-525=252 км прошёл второй поезд
4) 252:4=63 км/с скорость второго поезда

Answer 2

Problem Analysis

We are given that the distance between two cities is 777 meters. Two trains started towards each other, with the first train departing 3 hours earlier and traveling at a speed of 75 km/h. The trains met 4 hours after the second train started. We need to find the speed of the second train.

Solution

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

To solve this problem, we can use the formula: distance = speed × time.

The first train traveled for a total of 4 + 3 = 7 hours, and the second train traveled for 4 hours.

Using the formula, we can set up the following equation:

75 km/h × 7 hours + x km/h × 4 hours = 777 meters

Now, let's solve the equation to find the value of x.

Calculation

75 × 7 + 4x = 777

Simplifying the equation:

525 + 4x = 777

Subtracting 525 from both sides:

4x = 252

Dividing both sides by 4:

x = 63

Answer

The second train was traveling at a speed of 63 km/h.

Explanation

The first train traveled for a longer duration, so it covered a greater distance. The second train traveled for a shorter duration, so it covered a smaller distance. The sum of the distances covered by both trains is equal to the total distance between the two cities, which is 777 meters. By solving the equation, we find that the speed of the second train is 63 km/h.