The rectangular homogeneous gate shown below is $3\mathrm{.}00m$ high $1\mathrm{.}00m$ wide and has a frictionless hinge at the bottom. If the fluid on the left side of the gate has a density of $1,600k\frac{g}{m^3},$ the magnitude of the force $F(kN)$ required to keep the gate closed is most nearly:

A$.0$

B$.22$

C$.24$

D$.220$

One thing ik wondering is on this problem in the solution ig takes the H and divides it by two do you know why that is$?$