p=F/S
F=P
P=mg
p=mg/S
p=(40×10)/(400×10^-4)
p=10000 Па | 10 кПа
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p=F/S
F=P
P=mg
p=mg/S
p=(40×10)/(400×10^-4)
p=10000 Па | 10 кПа