SOLUTION: On a field trip when their bus breaks down 40 miles from the school. A teacher takes 5 of them back to school in her car, travelling at an average speed of 40 miles per hour. The

Question 857475: On a field trip when their bus breaks down 40 miles from the school. A teacher takes 5 of them back to school in her car, travelling at an average speed of 40 miles per hour.
The other 5 students start walking towards the school at a steady 4 miles per hour.
The teacher drops the 5 at school, then immediately turns around and comes back for the others, again travelling at a steady speed of 40 miles per hour. How far have the students waked by the time the car reaches them?
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
There are several things wrong with this problem.
1) The teacher could not leave any of the students alone.
2) How does the teacher have her car if they are on the bus field trip?
3) If the students were left alone they would not all walk. Some would stay; most would get on their cellphone to text or twitter but certainly not walk!
You can barely get them to walk in gym class.
4)I don't think so! Most students have never walked more than a mile before in their life.
It would take one hour to drive to school and another hour drive back.
So the students have walked 8 miles for two hours.
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