Fluid Mechanics & Hydraulics $17$ Problem $3$ An open cylindrical tank, $1\mathrm{.}2$ m in diameter and $6$ m tall has $0\mathrm{.}6$ m of oil $($S $=0\mathrm{.}80),0\mathrm{.}40$ m of gasoline $($S $=0\mathrm{.}90),$ and $0\mathrm{.}80$ m of sea water $($S $=1\mathrm{.}06).$ An orifice $100$ mm in diameter is located at the bottom with a discharge of $0\mathrm{.}029$ m$3/$s$.$ Determine the coefficient of discharge. Ans. $0\mathrm{.}66$