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**1-D Kinematics question, pls help:)**

**1. Homework Statement**

A train moves off from a station and accelerates uniformly for 30.0 s over a distance of 225 m. It continues with the speed aquired for another 135 s, then the driver applies the brakes and the train comes to rest with uniform retardation at the next station in a further 10.0 s. Calculate the distance between the two stations

**2. Homework Equations**

vav= s/t?

**3. The Attempt at a Solution**

In the first part of the equation 'A train moves from a station...over a distance of 225 m'. It states that accelerates uniformily for 30. s over distance of 225 m and then continues that speed for another 135 s, so i did 135 s/30 s and then multiplied the answer which is 4.5 by 225 m= 1012.5, therefore it travelled 1012.5 m in the first 165 sec. The part of the equation i dnt understand is the last part 'then the driver applies the brakes.....' and i do not understand what uniform retardation is. Could someone please help me?

I would really appreciate it, thankyou!:)