How much pressure is on an object 9sq cm at 30 meters deep?

To calculate the pressure on an object at a depth of 30 meters underwater, you can use the formula: pressure = depth × density of the fluid × gravitational acceleration. The density of water is approximately 1000 kg/m³, and gravitational acceleration is about 9.81 m/s². At 30 meters deep, the pressure due to the water column is approximately 30,000 Pascals (Pa) or 30 kPa, plus atmospheric pressure (around 101.3 kPa at sea level), resulting in a total pressure of about 131.3 kPa on the object. The area of the object (9 sq cm) does not affect the pressure but will influence the total force acting on it.