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: 62


112.5 drops/min

Work Step by Step

Flow rate is expressed as drops per minute. Use conversion factors (equal ratios) to convert the given values. $\frac{900\ mL}{2\ hr}=\frac{900\ mL}{2\ hr}\times\frac{15\ drops}{1\ mL}\times\frac{1\ hr}{60\ min}=\frac{13500\ drops}{120\ min}=\frac{13500\div120\ drops}{120\div120\ min}=\frac{112.5\ drops}{1\ min}$
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