a$)$ An aqueous solution of $30\%$ sodium chloride at $40C$ is thoroughly stirred in a standard

agitated vessel where the solution has a density $()$ and viscosity $()$ of $1200k\frac{g}{m^3}$ and

$1\mathrm{.}15{10}^{-2}Pa.$s respectively. A six$-$blade disk turbine of $0\mathrm{.}65m$ in diameter is centrally

mounted in the baffled agitated vessel. The mixing process took place under a fully turbulent

condition with a Reynolds number of $110,000.$ Determine the suitable turbine impeller speed

$($revolution per second$)$ and the power required to run this impeller. Table $1$ provides

the values of constants KL and KT for baffled tanks.

Table $1$ Values of constants KL and KT for baffled tanks.