с=2Пr с=2Пr*4 r=4r d=2d
S=ПR^2 S=П(R*4)^2
S=Пr^2 S=Пr^2*16
L=2*p*r,L=2*p*r*4,r=4*r,d=2*d
A=p*r^2
A=p*(r*4)^2
A=p*r^2*16
с=2Пr с=2Пr*4 r=4r d=2d
S=ПR^2 S=П(R*4)^2
S=Пr^2 S=Пr^2*16
L=2*p*r,L=2*p*r*4,r=4*r,d=2*d
A=p*r^2
A=p*(r*4)^2
A=p*r^2
A=p*r^2*16