What is the critical radius of insulation for a cylindrical wall? – McqOptions

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1.	What is the critical radius of insulation for a cylindrical wall?
A.	( frac{K}{H} )
B.	( frac{4K}{H} )
C.	( frac{K}{4H} )
D.	( frac{H}{K} )
Answer» B. ( frac{4K}{H} )

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