Which of the following equations as suggested by Colebrook and White gives the i

Question

Which of the following equations as suggested by Colebrook and White gives the increase in roughness of a new surface (ε0) with age/time (t) (where, ε = roughness of the surface after time't'. α = a co-efficient to be experimentally determined)?

Options:

A . ε = ε0 + α.t

B . ε = ε0 + α.t²

C . ε = ε0 + α.t³

D . ε = ε0 + α.t⁴

Answer: Option A

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