1. The problem statement, all variables and given/known data Starting from the front door of your ranch house, you walk 55.0m due east to your windmill, and then you turn around and slowly walk 40.0m west to a bench where you sit and watch the sunrise. It takes you 25.0s to walk from your house to the windmill and then 47.0s to walk from the windmill to the bench. For the entire trip from your front door to the bench, what is your average velocity? 2. Relevant equations [itex]\upsilon[/itex]av-x=x2-x1/t2-t1=Δx/Δt 3. The attempt at a solution 40.0m-55.0m/47.0s+25.0s = -0.208m/s So I got the answer to this problem by adding the time instead of subtracting it. The program I'm using shows this answer is correct. Though, I'm wondering why adding the time together instead of subtracting it works instead of the other way around. Can someone help explain this to me? Thanks.