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A boy walks uniformly along the sides of...

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?

A

(1) He has travelled a distance of 700 m

B

(2) His displacement is 500 m

C

(3) His velocity is not uniform throughout the walk

D

(4) His displacement is 700 m

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