For n-tubes in a vertical column of the tube bank pattern, identify the correct

Question

For n-tubes in a vertical column of the tube bank pattern, identify the correct statement.
(Where, D is the diameter of a single tube in the bank)

Options:

A . D e = n D

B . D e = n² D

C . D e = (1/n) D

D . D e = D

Answer: Option A
Answer: (a).D e = n D

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