1. The problem: A cyclist travels to work at an average speed of 3 m/s and returns home at an average of 9 m/s. Calculate the average speed for the whole journey. 2. Hints given by the teacher: The answer is not 6 m/s & the answer is around [approximately] 4.5 m/s. 3. The distance was not given, if it is needed... *m/s is meters per second.