Pвод=Pж-Fa=m*g-ρв*g*V=ρж*g*V-ρв*g*V=(ρж-ρв)*g*V=(7800-1000)*10*1*1,5*0,2=20400H=20.4кН
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Pвод=Pж-Fa=m*g-ρв*g*V=ρж*g*V-ρв*g*V=(ρж-ρв)*g*V=(7800-1000)*10*1*1,5*0,2=20400H=20.4кН