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75,36 = 2 3,14 r
75,36 = 6,28 r
12 = r
s² = r² + t²
s² = 12² + 16²
s² = 144 + 256
s² = 400
s = √400 = 20
Lselimut = π r s
= 3,14 12 20
= 753,6
75,36 = 2 . 3,14. r
75,36 = 628 . r
r = 12
L. selimut kerucut = πrs
3,14 . 12 . 20
= 753,6