A maintenance train travels 1800 m east along a straight track. It then reverses and travels 700 m west along the same track.
Which statement about the distance travelled by the train and its displacement is correct?
Distance 2500 m2500\ \text{m}2500 m; displacement 1100 m1100\ \text{m}1100 m west
Distance 2500 m2500\ \text{m}2500 m; displacement 2500 m2500\ \text{m}2500 m east
Distance 2500 m2500\ \text{m}2500 m; displacement 1100 m1100\ \text{m}1100 m east
Distance 1100 m1100\ \text{m}1100 m; displacement 2500 m2500\ \text{m}2500 m east