A body is projected vertically up at $\mathrm{t}=0$ With a velocity of $98 \mathrm{m} {\mathrm{s}}^{-1}$. Another body is projected from the same point with the same velocity after $4$ Seconds. Both bodies will meet at ?

Figure shows the displacement of a particle moving along $x$-axis as a function of time. The acceleration of the particle is zero in the region.

(a) $AB$

(b) $BC$

(c) $CD$

(d) $DE$

Select correct alternative

The figure shows the position-time graph of a particle moving on a straight-line path. What is the magnitude of the average velocity of the particle over $10$ seconds?

A person walks along an east-west street and a graph of his displacement from home is shown in the figure. His average velocity for the whole time interval is: