Answer: the pressure 30 meters underwater is about 4 times the pressure at the surface.
Explanation:
1) Pressure at the surface = Pressure of the atmosphere = 1 atm
Convert 1 atm to pascals.
1 atm = 101,325 Pa
2) Pressure 30 meters underwater = Pressure at the surface + pressure of the water
3) Pressure of the water = density of the water × g × deep
Pressure of 30 meters of water = 1000 kg/m³ × 9.81 m/s² × 30 m = 294,300 Pa
3) Pressure 30 meters underwater = 101,325 Pa + 294,300 Pa = 395,625 Pa
4) Ratio = 395,625 / 101,325 = 3,9
Therefore, the pressure 30 meters underwater is about 4 times the pressure at the surface level.
