Answer:
Acceleration of the car will be 25

Step-by-step explanation:
We have given velocity of train at t =3 sec v= 40 m/sec
And velocity of train at t = 4 sec v = 65 m/sec
So change in velocity dv= 65 -40 = 25 m/sec
Change in time dt = 4-3 = 1 sec
We know that acceleration is rate of change of velocity
So acceleration