What should a girl do who works and studies and is 50 km away from her home, and there is no prayer area for women at her university, and the prayer times (Dhuhr, Maghrib, Isha) begin while she is outside her home, so that she does not miss the prayer?

Prayer must be performed when its time arrives in a clean place, even if it is at the workplace, while searching for a clean spot. It is forbidden to delay prayer beyond its prescribed time without a legitimate Shar'i excuse. If one fears the prayer time will expire, the prayer should be performed to the best of one's ability, even with tayammum (definition) if water is unavailable. It is not permissible to delay prayer beyond its time under any circumstances, except in the case of combining two prayers under specific conditions.