A boy walks uniformally along the sides of a rectangular park of size $400\, m × 300\, m$, starting from one corner to the other corner diagonally opposite. Which of the following statement is incorrect

  • A

    He has travelled a distance of $700\, m$

  • B

    His displacement is $700 \,m$

  • C

    His displacement is $500\, m$

  • D

    His velocity is not uniform throughout the walk

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