$\"\"$

\

(a)

\

From the result of exercise 25,

\

The fluid force is $\"\"$ .

\

Where $\"\"$ is distance from the center of the rectangle to the surface of the fluid.

\

Observe the figure:

\

Here $\"\"$ , $\"\"$ and $\"\"$ .

\

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

\

Substitute corresponding values in the formula.

\

$\"\"$

\

Fluid force on a circular plate is $\"\"$ pounds.

\

$\"\"$

\

(b)

\

The fluid force is $\"\"$ .

\

Where $\"\"$ is distance from the the center of the rectangle to the surface of the fluid.

\

Observe the figure:

\

Here $\"\"$ , $\"\"$ and $\"\"$ .

\

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

\

Substitute corresponding values in the formula.

\

$\"\"$

\

Fluid force on a circular plate is $\"\"$ pounds.

\

$\"\"$

\

(a) Fluid force on a rectangular plate is $\"\"$ pounds.

\

(b) Fluid force on a rectangular plate is $\"\"$ pounds.