Introductory Chemistry (5th Edition)

Published by Pearson
ISBN 10: 032191029X
ISBN 13: 978-0-32191-029-5

Chapter 2 - Measurement and Problem Solving - Exercises - Problems - Page 52: 84


The cyclist must bike for $5.05 hours$

Work Step by Step

First we must convert the speed of $84 miles/hr$ to kilometers/hr. Using the conversion factor $1 mile/hr$ $=$ $1.60934 km/hr$, we can find that $24 mi/hr$ $=$ $38.6243 km/hr$ because: $$24 mi/hr\times\frac{1.60934 km/hr}{1 miles/hr} = 38.6243 km/hr$$ Next since we know that time = distance/velocity we can take the distance of 195 km and divide by the velocity or speed of 38.6243 to get a time of roughly $5.05 hours.$
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