a train accelerates uniformly from rest at station a to maximum speed of 72 km per hour the constant maximum speed is maintained for a period of time and the train then decelerate uniformly until it comes to a stop of station B. The distance between two railway station is 22km and the journey takes 20min if the magnitude of acceleration is half of that deceleration, by using graphical method determine (I)The acceleration in m/s (ii)Time t, taken in seconds (iii)Prove the solution by using Newton's equestion of motion.