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vol = 1/3 La t
753,6 = 1/3 . 3,14 . 12² . t
753,6 = 150,72 t
t = 5cm
s = √ 5² + 12²
= √ 25 + 144 = √ 169 = 13
luas = π . r (r + s)
= 3,14 . 12 (12 + 13)
= 3,14 . 12 . 25
= 942cm²