A pipe has diameter $0\mathrm{.}4m,$ length $0\mathrm{.}1km$ and coefficient of friction $0\mathrm{.}005.$ What is the length of an equivalent pipe which has diameter $0\mathrm{.}2m$ and coefficient of friction $0\mathrm{.}008?$

A$)195m$

B$)19\mathrm{.}5m$

C$)1\mathrm{.}95m$

D$)1950m$