A boy walks uniformly along the sides of a rectangular park of size `400mxx300m`, starting from one corner to the other corner diagonally opposite. Which of the following statements is incorrect?

Options

A. He has travelled a distance of `700 m`
B. His displcement is `700 m`
C. His displcement is `500 m`
D. His velocity is not uniform throughout the walk

Answer

B

Explanation

Displacement `vecAC= vecAB+vecBC`

`AC=sqrt((AB)^(2)+(BC)^(2))= sqrt((400)^(2)+(300)^(2))= 500 m`
Distance `= AB+BC= 400+300= 700 m`