Two trains simultaneously departed from the same station in opposite directions. After 2 hours, the distance between them became 280 km. With what average speed did each train move if the first train had it at 20 km / h? more than the second?
1. Let’s take for x the speed with which the first train followed. The speed of another (x -20) km / h.
2. In 2 hours, the first train traveled 2 kilometers from the departure station, the second
2 (x -20) kilometers.
3. Let’s make the equation:
2x + 2 (x -20) = 280;
4x = 320;
x = 80 km / h – the speed of the first train.
4. The speed at which the second train was traveling 80 – 20 = 60 km / h.
Answer: the speed of the first train is 80 km / h, the second is 60 km / h.
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