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A circular porthole has a diameter of $\"\"$ .

Radius of the circle is $\"\"$ .

Area of the circle is $\"\"$ .

Find the area of the circular porthole.

$\"\"$

Assume the center of the circular is 15 feet below the surface.

Therefore, $\"\"$ .

The fluid force is $\"\"$ .

The fluid pressure is $\"\"$ .

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

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Substitute corresponding values in the formula.

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

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