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oraz dwa stozki r=2 i h=2
V=πr²·6+2/3πr²·2=(6+4/3)·4π
S=2πr·6+2πr·L gdzie L=r√2
S=24π+4π√2
2.
Pb=2·Pp
Pb=πrL L-tworzaca
Pp=πr²
πrL=2πr²
L=2r
cosα=r/L=1/2⇒α=60 °
Pozdr
Johann