Answer
(a) $55~mi/h\gt55~km/h$
(b) $55~mi/h=88~km/h$
Work Step by Step
See conversion factors (inside front cover).
$1~mi=1.609~km$
(a) $55~mi/h\gt55~km/h$ because $1~mi\gt1~km$.
(b) $55~mi/h=(55~mi/h)(\frac{1.609~km}{1~mi})=88~km/h$.
Physics Technology Update (4th Edition)
by Walker, James S.
Published by
Pearson
ISBN 10:
0-32190-308-0
ISBN 13:
978-0-32190-308-2
Chapter 1 - Introduction to Physics - Problems and Conceptual Exercises - Page 16: 27
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