Question

Из 1 станции во 2 выехал 1 поезд ,скорость которого равна 90 км/ч.В тоже время из 2 в 1 станцию отправился 2 поезд который доедет до 1 станции за 12 часов.Между станциями 720 км Через сколько часов 1 поезд доедет до 2 станции? А)7 Б)8 В)6 Г)9 На сколько различаются скорости 2 поездов? A)20км ч Б) 30 км ч В)25 км ч Г)35 км ч Сколько км пути останется 2 поезду,когда 1 поезд доберется до 2 станции? А)240км Б)280км В)260 км Г)220км

Answer 1

1)720:90=8 часов(время пути первого поезда)
2)720:12=60 км/ч(скорость второго поезда)
3)90-60=30 км/ч (на столько различаются)
4)720-(60×8)=240 км

Answer 2

Calculation of the Time Taken by Train 1 to Reach Station 2

To calculate the time taken by Train 1 to reach Station 2, we can use the formula:

Time = Distance / Speed

Given that the distance between the stations is 720 km and the speed of Train 1 is 90 km/h, we can substitute these values into the formula:

Time = 720 km / 90 km/h = 8 hours.

Therefore, Train 1 will take 8 hours to reach Station 2.

Calculation of the Difference in Speeds between Train 1 and Train 2

To calculate the difference in speeds between Train 1 and Train 2, we need to find the speed of Train 2. We are given that Train 2 will reach Station 1 in 12 hours.

Using the formula mentioned earlier, we can calculate the speed of Train 2:

Speed = Distance / Time

Given that the distance between the stations is 720 km and the time taken by Train 2 is 12 hours, we can substitute these values into the formula:

Speed = 720 km / 12 hours = 60 km/h.

Therefore, the speed of Train 2 is 60 km/h.

The difference in speeds between Train 1 and Train 2 can be calculated as:

Difference = Speed of Train 1 - Speed of Train 2

Substituting the values, we get:

Difference = 90 km/h - 60 km/h = 30 km/h.

Therefore, the difference in speeds between Train 1 and Train 2 is 30 km/h.

Calculation of the Remaining Distance for Train 2 when Train 1 Reaches Station 2

To calculate the remaining distance for Train 2 when Train 1 reaches Station 2, we need to subtract the distance covered by Train 1 from the total distance between the stations.

Given that the distance between the stations is 720 km and Train 1 takes 8 hours to reach Station 2, we can calculate the distance covered by Train 1 using the formula:

Distance = Speed x Time

Substituting the values, we get:

Distance = 90 km/h x 8 hours = 720 km.

Therefore, Train 1 covers the entire distance between the stations.

The remaining distance for Train 2 can be calculated as:

Remaining Distance = Total Distance - Distance Covered by Train 1

Substituting the values, we get:

Remaining Distance = 720 km - 720 km = 0 km.

Therefore, when Train 1 reaches Station 2, Train 2 has already covered the entire distance and there is no remaining distance for Train 2.

To summarize: - Train 1 will take 8 hours to reach Station 2. - The difference in speeds between Train 1 and Train 2 is 30 km/h. - When Train 1 reaches Station 2, Train 2 has already covered the entire distance between the stations.

Based on the given options: - Train 1 will reach Station 2 in 8 hours (Option Б). - The difference in speeds between Train 1 and Train 2 is 30 km/h (Option Б). - The remaining distance for Train 2 when Train 1 reaches Station 2 is 0 km (Option А).