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Largest contract area is 40 cm because
40/20
2x20=40
the value of smallest area in SI unit
36000 divided by 2 is equal to 18000
Pressure and force are related, and so you can calculate one if you know the other by using the physics equation, P = F/A. Because pressure is force divided by area, its meter-kilogram-second (MKS) units are newtons per square meter, or N/m2.
Brick number 2 justified
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