Odpowiedź :
Skorzystajmy z prawa Pascala
[tex]S_{1}=10cm^{2}=0.001m^{2} \\F_{1}=60N\\S_{2} =?\\F_{2}=300N\\[/tex]
[tex]\frac{F_{1} }{S_{1} }=\frac{F_{2} }{S_{2} } \\[/tex]
[tex]\frac{60}{0.001}=\frac{300}{S_{2} } \\60S_{2}=0.3/:60\\S_{2} =5*10^{-3}m^{2}[/tex]