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moj kat α=30
β=60 Twoj kat
tgβ=2r/h
√3=10/h
h=10/√3
Pp=πr²=25π
Pb=2πr·h=100π/√3
V=Pp·h=25π·10/√3=250/√3=250/3·√3
Pc=2Pp+Pb=50π+100π/√3=50π(1+2/√3)
Pozdr
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