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: 63


$45.\overline{45}\ drops/min$

Work Step by Step

Flow rate is expressed as drops per minute. Use conversion factors (equal ratios) to convert the given values. $\frac{1\ L}{5.5\ hr}=\frac{1\ L}{5.5\ hr}\times\frac{1000\ mL}{1\ L}\times\frac{15\ drops}{1\ mL}\times\frac{1\ hr}{60\ min}=\frac{15000\ drops}{330\ min}=\frac{15000\div330\ drops}{330\div330\ min}=\frac{45.\overline{45}\ drops}{1\ min}$
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