1.

There metal walls of same cross-sectional area having thermal conductivity in the ratio 1 : 2 : 4 transfer heat at the rate of 15000 kcal/hr. For same thickness of wall, the temperature deop will be in the ratio

A. 1 ; 2 ; 4
B. 1 :
C. 4 ; 2 ; 1
D. 1 ; 1 ; 1
Answer» C.


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