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Ответ

Ответ дан
Kareliakl

p = F/S

S = F/p

F = S*p

Отсюда,

1) p = 280:0,2 = 1400 Па

2) S = 60:600 = 0,1 м^2

3)

4 мм^2 = 0,000004 м^2

2,5МПа = 2500000 Па

F =  2500000*0,000004 = 10 Н

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