Answer
$256$ $K$
Work Step by Step
We need $\frac{T_h - T_l}{T_h}$ = $\frac{75}{T_h}$ to be 0.22, so $T_h = 341$ $K$. Subtracting 75 to get the cold reservoir temperature, we get $256$ $K$.
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 - Problems - Page 605: 25a
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