There is no specific answer to mathematical modeling. The answer and scheme of the same question may be different, but the results are all in line with the meaning of the question. For your question, I want to remind you to start from the following five aspects:

1. Draw the floor plan of the teaching building by yourself (including several floors of the building, several stairs on the first floor, the width of the stairs (how many students can come down at the same time, the width will increase the value of V 1), the number of classrooms on the first floor, the distance from each teacher to the nearest stair exit, the distance from the classroom to the downstairs exit, and the distance from the safe position to the stairs. (The best data is the building height)

2. Work out the students' walking speed in an orderly way (the speed of going downstairs is V 1, and the speed of going downstairs to a safe place is V2.

3. Calculate the time from the classroom to the safe distance according to the data of your own teaching building, and consider the number of stairs at the same time, and how long it takes to evacuate all the students in the class at the same time to the greatest extent.

Considering that the earthquake is sudden and fast, the total time should be controlled well. Refer to related literature for specific actual time.

5. If the evacuation time is long, it can be suggested that the school increase the stairs and reduce the teaching floors of the school.

My ability is insufficient, and I have a little knowledge of mathematical modeling. Please forgive me if there is any mistake.