A $12$ cm by $5$ cm I$-$section is subjected to a shearing force of $10$ kN $.$ Calculate the shear stress at the neutral axis and at the top of the web. What percentage of shearing force is carried by the web $?$ Given $I=220{10}^{4}m{m}^4,$ area $=9\mathrm{.}4{10}^{2}m{m}^2,$ web thickness $=3\mathrm{.}5mm$ and flange thickness $=5\mathrm{.}5mm.$

$[$Ans$.27\mathrm{.}2\frac{N}{m}{m}^2$;$20\mathrm{.}1\frac{N}{m}{m}^2$;$9\mathrm{.}5kN.$ i$.$e$.,95\%$ of the total$]$