The critical radius of insulation for a spherical shell is (where, K = thermal c

Question

The critical radius of insulation for a spherical shell is (where, K = thermal conductivity of insulating material h0 = heat transfer coefficient at the outer surface)

Options:

A . K/h0

B . 2K/h0

C . h0/K

D . h0/2K

Answer: Option B

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