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= 62,8 : 3,14 : 2
= 20 : 2
= 10 cm
volume kerucut = 1/3 x luas alas x tinggi
luas alas = π x r²
= 3,14 x 10 x 10
= 314 cm²
tinggi kerucut = 12
volume = 1/3 x 314 x 12
= 1256 cm³