[tex]Dane:\\p = 8,5 \ kPa = 8 \ 500 \ Pa = 8 \ 500 \ \frac{N}{m^{2}}\\F = 340 \ N\\Szukane:\\S = ?\\\\\\p = \frac{F}{S} \ \ /\cdot S\\\\p\cdot S = F \ \ /:p\\\\S = \frac{F}{p}\\\\S = \frac{340 \ N}{8500\frac{N}{m^{2}}}\\\\\boxed{S = 0,04 \ m^{2} = 400 \ cm^{2}}[/tex]
