1.

Three metal walls of the same cross-sectional area having thermal conductivities in the ratio 1: 2: 4 transfer heat at the rate of 3000 kJ/hour. For the same wall thickness, the temperature drops will be in the ratio

A. 1 : 2 : 4
B. 1 : \(\frac{1}{2}\): \(\frac{1}{4}\)
C. \(\frac{1}{4}\) : \(\frac{1}{2}\) : 1
D. 1 : 1 : 1
Answer» C. \(\frac{1}{4}\) : \(\frac{1}{2}\) : 1


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