Question

Из Москвы и Ростова-на-Дону одновременно вышли навстречу друг другу два поезда. Поезд из Москвы шел скоростью 65 км/ч, а поезд из ростова-на-Дону - со скоростью на 7 км/ч меньшей. На каком расстоянии друг от друга будут поезда через 6 ч после начала движения, если расстояние между Москвой и Ростовом-на-Дону 1230 км?

Answer 1

1) скорость второго поезда 65-7=58 км/час
2) скорость двух поездов 65+58=123 км/час
3) 123*6=738 км прошли оба поезда за 6 час?
4) 1230-738=492 км
Ответ: поезда друг от друга будут на расстоянии 492 км.

Answer 2

1) 65 + ( 65 - 7 ) = 65 + 58 = 123 км\час - общая скорость
2) 6 * 123 = 738 км - общий путь
3) 1230 - 738 = 492 км - расстояние между поездами через 6 часов 
Ответ 492 км

Answer 3

Calculation of the Distance Between Moscow and Rostov-on-Don

To calculate the distance between Moscow and Rostov-on-Don, we can use the given information that the distance between the two cities is 1230 km.

Calculation of the Relative Speed of the Trains

The train from Moscow is traveling at a speed of 65 km/h, while the train from Rostov-on-Don is traveling at a speed 7 km/h slower. Therefore, the speed of the train from Rostov-on-Don is 65 km/h - 7 km/h = 58 km/h.

Calculation of the Distance Covered by the Trains After 6 Hours

To find the distance covered by each train after 6 hours, we can use the formula: distance = speed * time.

The train from Moscow will cover a distance of 65 km/h * 6 h = 390 km.

The train from Rostov-on-Don will cover a distance of 58 km/h * 6 h = 348 km.

Calculation of the Distance Between the Trains After 6 Hours

To find the distance between the two trains after 6 hours, we subtract the distance covered by the train from Rostov-on-Don from the total distance between the two cities.

Distance between the trains = Distance between Moscow and Rostov-on-Don - Distance covered by the train from Rostov-on-Don

Distance between the trains = 1230 km - 348 km = 882 km.

Therefore, the trains will be 882 km apart from each other after 6 hours of travel.

Please note that the sources provided do not contain relevant information for this specific calculation.