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A car travels along a straight line at a constant speed of 41.5 mi/h for a distance d and then another distance d in the same direction at another constant speed. The average velocity for the entire trip is 35.0 mi/h.

(a) What is the constant speed with which the car moved during the second distance d?

(b) Suppose the second distance d were traveled in the opposite direction; you forgot something and had to return home at the same constant speed as found in part (a). What is the average velocity for this trip?

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