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Two insulating material of thermal conductivity k and 2k are available for lagging a pipe carrying a hot fluid. If the radial thickness of each material is same
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- Material with higher thermal conductivity should be used for inner layer and one with lower thermal conductivity for the outer
- Material with lower thermal conductivity should be used for inner layer and one with higher thermal conductivity for the outer
- It is immaterial in which sequence the insulating material are used
- It is not possible to judge unless numerical values of dimension are given
Correct Option: B
NA
