Constant speed of 20m/s, Starting point, Acceleration = (10-15)/5 = -1m/s2, Greater acceleration = (20-10)/5 = 2m/s2, Acceleration = (15-0)/10 = 1.5m/s2, Means speed in a given direction, Distance travelled = 30 x 20 = 600m, Distance travelled = (15 x 10) / 2 = 75m.

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