an upright cylindrical tank which is open to the atmosphere is filled with water to a depth of 15m. given that the atmospheric pressure is 735mmHg what will the pressure at the very bottom of coumn of water be?

An upright cylindrical tank which is open to the atmosphere is filled with water to a depth of 15m (see Figure 1). Given that the atmospheric pressure (P0) is 735mmHg. what will the pressure at the very bottom of the column of water (Pb) be? H2O=9.804kN/m3;Hg=133kN/m3 Figure 1: Column of water open to the atmosphere