On August 26, 1989, a train in south africa carried a record number of 660 cars. what was the length of the train?

Answer 1

It depends on the length of each wagon, and if there are multiple storeys/layers, and the lengths of the cars.

Assuming no multiple storeys, and an average of 6 metres per car, with no car transported side-by-side, and ignoring the distance between wagons, we have
6*660m = 3960 m = 4 km (approx.)