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a) $\dfrac{Q}{t} = \dfrac{A(T_1 – T_2)}{\frac{l_1}{k_1} + \frac{l_2}{k_2} + \frac{l_3}{k_3}}$

b) $\dfrac{Q}{t} = \dfrac{A(T_1 – T_2)}{\displaystyle\sum_{i=1}^n \dfrac{l_i}{k_i}}$

Giancoli 6th Edition, Chapter 14, Problem 43

(5:48)

Chapter 14, Problem 43 is solved.

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