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v=24 pi
v=Pp*H=Pi *r do 2*H
pi* r do 2 *H=24pi
Pi* r do 2 *3r=24pi /:pi
3r do 3(bo masz3 r do 2 i jedno r do 1)=24 /:3
r do 3 =8
r=2 bo 2 do 3 potęgi to2*2*2=8