преподаватель математики в онлайн школе решил сдел...

Figuring out the calculation

From what I’m seeing, the missing word could be "ИИ" (AI). The teacher used it to reduce lesson time by 20%, helping them complete their course in exactly 60 days. Now, the query asks for the average time spent per lesson — could be about 4 hours every 5 days, but less with AI.

Breaking down the math

I think the phrase should be "сколько минут работы в среднем преподаватель тратил бы на один урок" (how many minutes per lesson). The scenario is clear: 30 lessons, originally planned at 4 hours each every 5 days, totaling 150 days. With AI cutting time by 20%, he managed to finish in 60 days. Now, I need to figure out the average time per lesson.

Clarifying the time calculation

This seems to be asking how many minutes the teacher worked on average per day during the 60 days, but their schedule only included work on lesson days, not every day. Since AI reduced the work time per lesson by 20%, the irregularity in the schedule affects how I should calculate the total work time.

Deciding on interpretation

It seems the question could be asking for average minutes per lesson. "На один урок" feels natural, but the phrasing with "бы" suggests a hypothetical, so I need to decide if I calculate with or without AI. Since the course finished in 60 days, I'll focus on the time per lesson after AI, even though the exact lesson time isn't clear.

Thought for 17s