c$.$ When a settling analysis was run on the above type$-1$ suspension, using a column with a depth of $1\mathrm{.}8m,$ the following relationship was obtained:

Mass fraction, $F$ having settling velocity less than $V_F=20V_F,$

where $V_F$ varied from $0$ to $0\mathrm{.}03\frac{m}{m}in.$

What will be the theoretical removal efficiency of a sedimentation tank removing discrete particles $($type$-1$ suspension$)$ with an overflow rate of $25\frac{m^3}{m^2}*d?$