Published by:
CGP EDU Academic Team
Published on: August 14, 2026
A cylinder of radius 
is surrounded by a cylindrical shell of inner radius 
and outer radius 
. The thermal conductivity of the material of the inner cylinder is 
and that of the outer cylinder is 
. Assuming no loss of heat, the effective thermal conductivity of the system for heat flowing along the length of the cylinder is:
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
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