Answer
46.3mph
Work Step by Step
Time taken for the first trip : Time = distance / speed = 200/55 = 40/11
Time taken on the second trip = 200/40 = 5
Average speed = total distance / total time = $\frac{200+200}{\frac{40}{11} + 5} \approx 46.3$
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 1 - 1.3 - Modeling with Linear Equations - 1.3 Exercises - Page 98: 46
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