Elementary Technical Mathematics

Published by Brooks Cole
ISBN 10: 1285199197
ISBN 13: 978-1-28519-919-1

Chapter 7 - Section 7.1 - Ratio - Exercises - Page 271: 68


$6.\overline6\ hr$

Work Step by Step

Find the total number of drops. $1.4\ L\times\frac{1000\ mL}{1\ L}\times\frac{10\ drops}{1\ mL}=14000\ drops$ Divide the number of drops by the flow rate to find the time. $14000\ drops\div\frac{35/ drops}{1\ min}=14000\ drops\times\frac{1\ min}{35\ drops}=400\ min$ Convert to hours. $400\ min=400\ min\times\frac{1\ hr}{60\ min}=6.\overline6\ hr$
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