A smooth steel $($SG$=7\mathrm{.}86)$ sphere is dropped in gasoline at $20\backslash$deg C$.$ Ignoring its acceleration phase, what will be its terminal $($constant$)$

fall velocity? Take D$=1$cm$.$ For gasoline at $20\backslash$deg C$,$ take $\backslash$rho ~~$680$k$($g$)/($m$^(3))$ and $\backslash$mu ~~$2\mathrm{.}92$E$-4$k$($g$)/($m$)*$s$.$ For steel, take $\backslash$rho ~~$7800$k$($g$)/($m$^(3)).$ Take

$\backslash$pi $=(22)/(7).$ Take C$\_($D$)$~~$0\mathrm{.}4.$

The terminal fall velocity is $($m$)/($s$).$