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l=10
5^2+x^2=10^2
25+x^2=100
x^2=75
x=5 pierwiastków z 3
H=5 pierwiastków z 3
V=1/3pir^2*H
V=1/3*5^2pi*5 pierwiastków z 3
V=1/3*125 pierwiastków z 3
V=41,4cm^3