Ming walks 2.0 km [N] then 1.75 km [S] in 1.5 h. What is his average speed?
https://smartwritings.org/wp-content/uploads/2020/07/logo-300x75.png00adminhttps://smartwritings.org/wp-content/uploads/2020/07/logo-300x75.pngadmin2020-08-12 10:18:422020-08-12 10:18:42ming walks 20 km n then 175 km s 15 h what his average speed
