The critical radius of insulation for cylindrical pipe is (where, hi = heat transfer coefficient at inside of the pipe) A)K/h₀ B)2K/h₀ C)hi/K D)2hi/K

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The critical radius of insulation for a cylindrical pipe is given by the formula K/h₀, where K is the thermal conductivity of the insulation material and h₀ is the heat transfer coefficient at the outer surface of the insulation.

The Critical Radius of Insulation for Cylindrical Pipe Is (Where