Which one of the following represents effective width of flange of T-beam?
1
\(\frac{{{{\rm{I}}_0}}}{{12}} + {{\rm{b}}_{\rm{w}}} + 3{{\rm{D}}_{\rm{f}}}\)
2
\(\frac{{{{\rm{I}}_0}}}{6} + {{\rm{b}}_{\rm{w}}} + 3{{\rm{D}}_{\rm{f}}}\)
3
\(\frac{{{{\rm{I}}_0}}}{{12}} + {{\rm{b}}_{\rm{w}}} + 6{{\rm{D}}_{\rm{f}}}\)
4
\(\frac{{{{\rm{I}}_0}}}{6} + {{\rm{b}}_{\rm{w}}} + 6{{\rm{D}}_{\rm{f}}}\)