A gold ring (k = 65 W/m K) measuring 15 * 10 * 60 cm is exposed to a surface whe

Question - A gold ring (k = 65 W/m K) measuring 15 * 10 * 60 cm is exposed to a surface where h = 11.5 W/m² K. Find the value of biot number

Options:

A . 0.68

B . 0.58

C . 0.48

D . 0.38

Answer: Option C
Answer: (c).0.48

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