A hot fluid is being conveyed through a long pipe of 4 cm outer diameter and cov

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A hot fluid is being conveyed through a long pipe of 4 cm outer diameter and covered with 2 cm thick insulation. It is proposed to reduce the conduction heat loss to the surroundings to one-third of the present rate by further covering with same insulation. Calculate the additional thickness of insulation

Options:

A . 11 cm

B . 12 cm

C . 13 cm

D . 14 cm

Answer: Option B
Answer: (b).12 cm

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