Calculating Total Distance Covered by a Subway Train in 84 Seconds

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To calculate the total distance covered by the subway train in 84 seconds, the problem can be divided into three segments: acceleration, constant speed, and deceleration. The train accelerates from rest at 1.60 m/s² for 14 seconds, covering a distance of 158.4 meters. It then maintains a constant speed for 70 seconds, traveling an additional 560 meters. Finally, the train decelerates at 3.50 m/s² until it stops, covering 56 meters during this phase. The total distance covered by the subway train is 774.4 meters.
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A subway train starts from rest at a station and accelerates at a rate of 1.60m/s2 for 14.0s. It runs at a constant speed for 70.0s and slows down at a rate of 3.50m/s2 until it stops at the next station. Find the total distance covered.

I have no idea what to do for this problem.
 
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What kinematic equations do you know? You must have some idea if you are studying this stuff. Give more information on what it is you don't understand. Start by breaking up the problem into pieces. The accelerating part, the constant speed part and the decelerating part.

Give it a try.
 

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