An automobile moves along a straight level road on which a milestone is taken as the origin (x=0).
(i) At 09:00 h the car is at +250m. It then travels +120m and afterwards −300m. Find its final position at 09:20 h.
(ii) Determine the displacement of the car for the entire 09:00–09:20 h journey.
(iii) Calculate the total distance travelled during the same interval.