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a) s² = t² + r²
t² = s² - r²
t² = 17² - 8²
t² = 289 - 64
t² = 225
t = 15 cm
b) volume kerucut = 1/3 x luas alas x tinggi
= 1/3 x πr² x t
= 1/3 x 3,14 x 8 x 8 x 15
= 1004,8 cm³