Essential University Physics: Volume 1 (3rd Edition)

$1,976,371 \ N$
From the definition of pressure, we know: $F=PA$ $F=\rho gh (\frac{h}{2}(b_1+b_2))$ This simplifies to: $F=.5\rho g h^2 (b_1+b_2)$ $F=.5(1000)(9.81) (3.3)^2 (15+22)=1,976,371 \ N$