Mary starts from her house, walks 80 meters south, and stops to chat with her aunt on the sidewalk. After chatting for a few minutes, she walks 125 meters to the west to meet a friend and then walks 45 meters north with her friend to a cafe for lunch. Overall, she takes 10 minutes to do all this. What is Mary’s average speed?
The average speed will be: Total distance travelled divided by time taken Total distance (in metres)= 80+125+45=250 Total time (minutes) =10 250/10 =25 Thus Mary's average speed is 25 metres per minute.
