(Note: In Problems, assume a number like 6.4 is accurate to ? 0.1; and 950 is ? 10 unless 950 is said to be ?precisely? or ?very nearly? 950, in which case assume 950 ? 1. See Section 1?4.)
(II) Calculate the average speed and average velocity of a complete round trip in which the outgoing 250 km is covered at 95 km/h, followed by a 1.0-h lunch break, and the return 250 km is covered at 55 km/h.
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