Question

В 9 ч утра два поезда выехали из двух городов навстречу друг другу в 11 ч утра до встречи им оставалось проехать 420км найди скорасть движения однаго поезда если скорасть другого поезда была 100км/ч а расстоян ие между горадами 780км

Answer 1

(780-420-100*2):2=80(км/ч)
Ответ: V равна 80 км/ч.

Answer 2

780-420=360
360-200=160
160/2=80
Ответ: 80км/ч скорость второго поезда!

Answer 3

Problem Analysis

We have two trains that start from two different cities and are heading towards each other. The distance between the cities is 780 km. The first train has a speed of 100 km/h. 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

We know that the distance between the two cities is 780 km. We also know that the two trains started at 9:00 am and will meet at 11:00 am, which means they have 2 hours to travel the remaining distance of 420 km.

Let's calculate the speed of the second train using the formula:

Speed = Distance / Time

Speed = 420 km / 2 hours

Speed = 210 km/h

Therefore, the speed of the second train is 210 km/h.

Answer

The speed of the second train is 210 km/h.