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A truck travels due east for a distance of 1.7km,turn around and goes due west for 8.5km,and finally turns around again and travel 2.7km due

A truck travels due east for a distance of 1.7km,turn around and goes due west for 8.5km,and finally turns around again and travel 2.7km due east.

a $)$ What is the total distance $($ in km $)$ that the truck travels?

$($ b $)$ What are the magnitude in km $)$ and direction of the truck displacement?

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