The critical radius of insulation for a spherical shell is (where, K = – McqOptions

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1.	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) ?
A.	K/h0
B.	2K/h0
C.	h0/K
D.	h0/2K
Answer» C. h0/K

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