Is it permissible to pray in the bathing area of a changing room that is free from a toilet, and is it permissible to combine prayers on the way to work, a journey that takes an hour and covers a distance of 40 kilometers?

Prayer is valid everywhere except in prohibited places. It is permissible to pray in a changing room. However, praying in a bathroom is forbidden, unless there is a genuine necessity. It is not permissible to combine two prayers except for a legitimate excuse, and the mentioned distance between home and work is not an excuse that permits combining prayers. The general rule is that combining two prayers without an excuse is among the grave sins. You must magnify the matter of prayer and not take it lightly.