I walk 1km up the hill at 4km/h and 1km down the hill at 6km/h.
What is my mean speed?
Average speed (ie mean speed) is defined as "total distance travelled" divided by "time to travel the distance." (It is a common error to find two speeds and take a geometric average.) We know the distance, we need to find the time.Originally Posted by Natasha1
So the average speed for the round trip will be: