Answer:
For
a person, the time-velocity graph is as shown in Fig. 2(a).26(a). Here the
areas A and B are equal but of
opposite
signs because the net displacement of the person in going to post-office and
coming back is zero.
The
time-displacement graph is as shown in Fig. 2(a).26(b). In this graph, as the
velocity of person in going is less than that of return journey, hence the
slope of portion OA is smaller than that of portion BC because the slope of
time - displacement graph gives the velocity.
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