Question

I need help understanding why the student started walking towards school in four minutes instead of three minutes

Answer 1

In the first 3 minutes after school, the student walks 6 blocks away from school.

In the last 4 minutes after school, the student walks 8 blocks towards school. In minute 8, the student is 12 blocks away from school. In minute 12, the student is 4 blocks away from school.