Two trains left from different cities, the distance between which is 900 km. The first train had

Two trains left from different cities, the distance between which is 900 km. The first train had a speed of 60 km / h, while the second train had a speed of 80 km / h. How far apart were the trains 1 hour before the meeting? Is there an extra condition in the problem?

1. Determine the distance from the meeting point was the first train an hour before the meeting of the two trains.

60 km / h * 1 h = 60 km.

2. Let’s find the distance from the meeting point was the second train one hour before the meeting of the two trains.

80 km / h * 1 h = 80 km.

3. Let’s calculate what distance the trains were from each other 1 hour before the meeting.

60 km + 80 km = 140 km.

Answer. 1 hour before the meeting, the trains were at a distance of 140 kilometers from each other.

There is an extra condition in the problem – the distance between cities.