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A composite cylinder is made of two mate...

A composite cylinder is made of two materials having thermal conductivities `K_(1)` and `K_(2)` as shown. Temperature of the two flat faces of cylinder are maintained at `T_(1)` and `T_(2)`. For what ratio `K_(1)//K_(2)` the heat current throught the two materials will be same. Assume steady state and the rod is lagged (insulated from the curved surface).

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