$\"\"$

Observe the figure :

The depth is $\"\"$ .

The length is $\"\"$ .

Redraw the figure:

$\"\"$

Length of the rectangle is $\"\"$ .

The weight density of water is $\"\"$ .

The limits range from $\"\"$ to $\"\"$ .

$\"\"$

The fluid force can be calculated by using the formula : $\"\"$ .

Substitute $\"\"$ and $\"\"$ and $\"\"$ .

$\"\"$

Therefore, the fluid force is $\"\"$ .

$\"\"$

The fluid force is $\"\"$ .