$(19)$ A vertical cylindrical tank $1\mathrm{.}5$ high and $0\mathrm{.}9$ m in diameter is filled with

water to a depth of $1\mathrm{.}2$ m$.$ The tank is then closed and the pressure in the

space above the water raised to $69$ kPa. Calculate the pressure at the

intersection of the wall and tank bottom when the tank is rotated about a

central vertical axis at $150$ rev$/$min$.$ In addition calculate the resultant force

exerted by the water on the bottom of the tank