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v=120πcm3
h=10 cm
120π=πr²*10*⅓ /10π
12=r²*⅓ /*3
36=r²
r =√36
r=6
h²+r²=l²
10²*6²=l²
100+36=l²
136=l²
l=√136
l= 10√1,36