ok so for her total dispacement she basically only went 42 km since she had to turn around the first time correct? but I am having trouble with the time would her total time be 30 mins since she had to turn around and then look for the report?
Homework Statement
A commuting student leaves home and drives to school at an average speed of 42.0 km/h. After 22.0 min she realizes that she has forgotten her homework and returns home to get it at the same average speed. It takes 8.0 min to find the report, after which the trip to school...