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t² = s² - r²
t² = 13² - 5²
t² = 169 - 25
t² = 144
t = √144
t = 12 cm
volume kerucut :
1/3.π.r².t =
1/3. 3,14.5².12 =
1/3.3,14.300 =
100.3,14 = 314 cm^3