the v-t plot of a moving object is shown in the figure. the average velocity of the object during the first 10 seconds is
Chandni. You forgot to post the plot.
Anyways i give you general idea.
Average velocity = Total distance covered in 10 seconds divided by 10 seconds
Now total distance covered = Area under v-t graph
You can divide the area into triangular and rectangular sections. Once you get the total distance, divide it by time. Here Total area = 40 + 80 + 20 = 140 m
Average velocity = 140 / 10 = 14 m/s