3 ms·
According to wikipedia, preferred walking speed is 3.1mph http://en.wikipedia.org/wiki/Preferred_walking_speed http://en.wikipedia.org/wiki/Preferred_walking_s
by NhanH 12y ago
According to wikipedia, preferred walking speed is 3.1mph
http://en.wikipedia.org/wiki/Preferred_walking_speed http://en.wikipedia.org/wiki/Preferred_walking_speed