M=ro*V=ro*(a^3-(a-2d)^3) p=mg/S=ro*(a^3-(a-2d)^3)*g/a^2 p*a^2/(ro*g)=a^3-(a-2d)^3 (a-2d)^3=a^3-p*a^2/(ro*g) (a-2d)=(a^3-p*a^2/(ro*g))^(1/3)=a*(1-p/(ro*g*a))^(1/3) 2d=a-a*(1-p/(ro*g*a))^(1/3)=a*(1-(1-p/(ro*g*a))^(1/3)) d=a*(1-(1-p/(ro*g*a))^(1/3))/2 d=0,2*(1-(1-2700/(2700*10*0,2))^(1/3))/2 м = 0,02 м = 2 см
p=mg/S=ro*(a^3-(a-2d)^3)*g/a^2
p*a^2/(ro*g)=a^3-(a-2d)^3
(a-2d)^3=a^3-p*a^2/(ro*g)
(a-2d)=(a^3-p*a^2/(ro*g))^(1/3)=a*(1-p/(ro*g*a))^(1/3)
2d=a-a*(1-p/(ro*g*a))^(1/3)=a*(1-(1-p/(ro*g*a))^(1/3))
d=a*(1-(1-p/(ro*g*a))^(1/3))/2
d=0,2*(1-(1-2700/(2700*10*0,2))^(1/3))/2 м = 0,02 м = 2 см