Velocity-time graph for a moving object is shown in the figure. Total displacement of the object during the time interval when there is non-zero acceleration and retardation is.

Options

A. 60 m
B. 50 m
C. 30 m
D. 40 m

Answer

B

Explanation

Between time interval `20 sec` to `40 sec`, there is non-zero acceleration and retardation.
Hence, distance travelled during this interval.
=`(1)/(2) xx 20 xx 3 + 20 xx 1 = 30 + 20 = 50 m`.