• # question_answer 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                                 [HP PMT 1999] 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

Displacement $\overrightarrow{AC}=\overrightarrow{AB}+\overrightarrow{BC}$                    $AC=\sqrt{{{(AB)}^{2}}+{{(BC)}^{2}}}=\sqrt{{{(400)}^{2}}+{{(300)}^{2}}}=500m$                    Distance $=AB+BC=400+300=700m$