Calculate the power required to agitate a vertical tank with baffles and a

diameter of $15$ m that has a central six$-$bladed disc turbine with a diameter of $0\mathrm{.}5$ m and is located $0\mathrm{.}9$ m above the bottom of the tank. The turbine speed is $95$ rpm$.$ The tank is filled to a height of $7\mathrm{.}5$ m with a glycerin solution at $20\backslash$deg C