Answer
It will take 30 minutes.
Work Step by Step
The inlet pipe is working at 1/5=.2 tanks per minute while the outlet pipe is working at 1/6=.167 tanks per minute. Thus:
$ 1 = .2t - .167t \\ 1 = .0333t \\ t = 30$
Elementary Algebra
by Kaufmann, Jerome; Schwitters, Karen;
Published by
Cengage Learning
ISBN 10:
1285194055
ISBN 13:
978-1-28519-405-9
Chapter 7 - Algebraic Fractions - 7.6 - More Fractional Equations and Problem Solving - Problem Set 7.6 - Page 315: 41
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