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1/3.π.8².6-1/3.π.r².6=244,92
2.3,14(64-r²)=244,92
64-r²=39
r²=25
r=5
401,92-244,92=157
v=1/3x3,14xrxrx6
157=3,14xr^2x2
r^2=157/6,28
r^2=25
r=5