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1256 = ⅓ × 3,14 × 10 × 10 × t
1256 = ⅓ × 314 × t
1256 × 3/1 = 314 × t
3768 = 314 × t
3768/314 = t
12 = t
Jadi, tinggi kerucut tersebut 12 cm.