A racing team is preparing their car for a race. It's a one mile track and they want to observe it's performance in a test. They tell the driver he must drive around the track once and maintain an average speed of 60 MPH. During the first half of the lap the car has some problems and, when he is half way around the circuit, the driver realizes he's only averaged 30 MPH. What speed must the driver now average for the remainder of the track in order to average 60 MPH for the entire circuit?

Have fun,

      - Mark