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A uniformly decelerating train of length 2 0 m enters a station of length 4 0 m . The front of the train leaves the

A uniformly decelerating train of length

20

m enters a station of length

40

.

The front of the train leaves the station

5

s later and the end of the train leaves the station after a further

5

seconds. Find the deceleration of the train.

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