At a speed of 60 meters, the distance from the school is 60×5=300 meters.

So during this time, students * * * pulled down 400+300=700 meters.

Because the speed of 50 meters per minute is 60-50= 10 meters lower than the speed of 60 meters.

So when I got to school, it took the students 700÷ 10=70 minutes.

1, because I walked for 2 minutes at first,

So it takes 70+2=72 minutes to get to school 50 meters per minute.

Therefore, the distance from home to school is (72+8) × 50 = 4000m.

2. Go forward 50×2 = 100 meters.

It takes 70-5=65 minutes to switch to 60 meters per minute.

Therefore, the distance from home to school is 65× 60+ 100 = 4000m.