Ravi told his friend that his house is `1 km` towards south from the main post office . Express the displacement and the distance moved by the friend from the post office , when he arrives at Ravi's house . Mention the reference point chosen by you.

Explanation

We choose main post office as the reference point . As the motion is long a straight line , therefore , magnitude of distance and displacement is equal ` = 1 km` . The direction of displacement is towards south.