Answer
The engine in (b) is third in rank. The heat extracted being the same implies that the work done is directly proportional to efficiency. We have:
Work Step by Step
Ultimately:
Fundamentals of Physics Extended (10th Edition)
by Halliday, David; Resnick, Robert; Walker, Jearl
Published by
Wiley
ISBN 10:
1-11823-072-8
ISBN 13:
978-1-11823-072-5
Chapter 20 - Entropy and the Second Law of Thermodynamics - Questions - Page 603: 8b
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