Racing Up
and Down
the Mountain
Matthew Speedster drove up a mountain road at 50 kilometers per hour. He turned around instantly at the top and drove back down the same road very fast. When he returned to his starting place he discovered he had averaged 100 kilometers per hour for the entire trip.
How fast did he come down the mountain?
When you finish this problem, please share your answer and your thinking with Mr. L. He may have some follow up questions for you to consider.
