The electronic throttle control of a model train is programmed so that the train speed varies with position as shown in the plot. Determine the time t required for the train to complete one lap. [Answer: 50.8s] 1m 1 m 2 m 0.250 0.125 2 2+5 2+1 4+n 2+ 4+2n Distance s, m Speed v, m/s

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