A train moves from one station to another in 2 hours’ time. Its speed-time graph during this motion is shown in the figure. The maximum acceleration during the journey is

Maximum acceleration will be represented by CD part of the graphbecause slope of CD part is large compared to any other partCD along vertical axis=60-20CD along horizontal axis=1.25-1=0.25 acceleration=dvdt=CD along vertical axisCD along vertical axis=(60−20)0.25=160 km/h2