Is the criterion for shortening prayers (qasr) the distance between the two towns, or the distance covered by the traveler, and do the rulings on qasr apply if the distance covered reaches 90 kilometers while the distance between the two towns is less than 70 kilometers?

A traveler is permitted to shorten the prayer if the long route is the only way to reach the intended destination, or if they take it for a valid purpose such as safety and ease. However, if they take it merely for the purpose of availing themselves of the travel concessions, then shortening the prayer is not permissible, according to the correct scholarly opinion.