$41)$ A string of linear density $1\mathrm{.}5$ g$/$m is under a tension of $20.$ N$.$ What should its length be if its

fundamental resonance frequency is $220.$ Hz$?41)\_\_\_\_\_\_$

A$)2\mathrm{.}1$ m B$)43.$ cm C$)0\mathrm{.}96$ m D$)1\mathrm{.}1$ m E$)0\mathrm{.}26$ m