Two trains simultaneously set off from the same station in opposite directions. After 2 hours the distance between

| January 16, 2021 | education

Two trains simultaneously set off from the same station in opposite directions. After 2 hours the distance between them became 280 km. What is the average speed of each train moving if the first train had it at 20 km / h. more than the second?

1. Let’s designate for the variable x the average speed of the second train.

2. Then the average speed of the first train will be (x + 20) km / h.

3. Knowing how much time the trains were on the way and the total distance that they covered during this time, we make an equation and find the average speed of each train:

2x + 2 * (x + 20) = 280;

4x + 40 = 280;

4x = 240;

x = 60;

x + 20 = 60 + 20 = 80.

Answer: The average speed of the first train was 80 km / h, and the average speed of the second train was 60 km / h.



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