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Don't know how to answer it

A train is travelling with constant acceleration along a straight track. At time t=0 seconds, the train passes a point O travelling with velocity 18m/s. At time t=12 seconds, the train a point P travelling with velocity 24m/s. At time t=20 seconds, the train passes a point Q. Find: a) the speed of the train at Q
Reply 1
28m/s

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