93. A small train puzzle. The express from Basltown to Ironchester travels at a speed of 60 km/h, and the express from Ironchester to Basltown, which departs simultaneously with it, travels at a speed of 40 km/h.

How far apart will they be one hour before meeting?

I couldn't find these cities on any map or in any reference, so I don't know the exact distance between them. Let's assume it does not exceed 250 km.
93. To solve the problem, no algebraic calculations are required, nor do you need to know the distance between the cities. Let's send both trains back from the meeting point, wherever it may have occurred, at the same speeds. Then in one hour, the first train will travel 60 km, and the second 40 km. Therefore, the distance between the trains one hour before the meeting is \(60+40\), or 100 km.