KEAM 2018 Physics and Chemistry Paper

Given, figure shows the relation between speed and time. So, area of the figure will be displacement.
Therefore,
area of first triangular (d1)=‌

1

2

×10×10=50m
area of second triangular
(d2)=‌

1

2

×(−10)×10=−50m
Therefore, total area (d) = total displacement of particle
⇒‌‌d1+d2=50−50=0