25 minutes. That was far too long.
I was on a YTS scheme and sent on placement to an office, (so was a teenager)
It was just me and the owner working in the office on an industrial estate, he showed me where I would be working,
hard plastic chair typing from a phone book on my knee doing data entry, my neck would have been ruined,
he told me how I had 30 minutes for lunch and if I wanted the toilet, it was at the far end of the building and I had to "earn toilet time", 30 seconds for every hour worked then
he commented about my clothes, I was wearing a blouse up to my collarbone with long sleeves and a pair of black trousers and brogues he advised that I should wear something lower cut and a skirt and heels, there was no contact with the public in this job.
This had taken 20 minutes in total as he droned on and on about what he expected the work production rate to be (no breaks in typing at all and done in complete silence),
I went out for a smoke before I started (I don't smoke) and left and went into the nearest phone box to let my scheme know what happened, No trainees were ever placed there again despite him contacting them many times.