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Pressure is force per area, P=F/A. I am not sure what you mean by an "area of 20m cubed", since by definition something cubed is a volume, not an area. If you mean that you have a cube of volume 20m^3, you can find the area of one side by Area=Volume/length of one side. (in this case that would equal 7.4m^2). so the Pressure would be equal to 30N/7.4m^2=4.05 Pascals

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Q: You 30n of force is exerted over an area of 20 m cubed how much pressure is being applied?
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