The author posted a question in **Education**

Was the motorcyclist driving from the city to the village at 60 km/h? and got a better answer

Response from **Let S be the distance from town to town. Then the travel time there and back is t= S/60 + S/36= 3S/180 + 5S/180= 8S/180= 2S/45 V cf= 2S/t= 2S*45 /2S= 45 km/h The average speed is the ratio of the total distance traveled for the entire travel time, not the arithmetic mean?**

Response from

Let S be the distance from the village to the city. Then a back and forth journey time is t= S 60 + S 36= 3S 180 + 5S 180= 8S 180= 2S 45 V cf= 2S t= 2S*45 2S= 45 km h Average speed is the ratio of travelled distance to travel time, not arithmetic mean.

**0**[+++++]Let S be the distance from the village to the city. Then a back and forth journey time is t= S 60 + S 36= 3S 180 + 5S 180= 8S 180= 2S 45 V cf= 2S t= 2S*45 2S= 45 km h Average speed is the ratio of travelled distance to travel time, not arithmetic mean.

Response from

add up the speed and divide by 2.

**0**[+++++]add up the speed and divide by 2.

Response from

That's some kind of a sucker, not a motorcyclist. 36 km/h. No, see?

**0**[+++++]That's some kind of a sucker, not a motorcyclist. 36 km/h. No, see?