tolong dong bantuannya eheh lopyu

cari dulu jari-jarinya (r)

K = 2.π.r
31,4 = 2 . 3,14 . r
31,4 = 6,28. r
r = 31,4 / 6,28
r = 5 cm

cari tinggi
t² = s² - r²
t² = 13² - 5²
t² = 169 - 25
t² = 144
t = √144
t = 12 cm

Volume = 1/3 . π. r² . t
V = 1/3 . 3,14 . 5² . 12
V = 3,14 . 25 . 4
V = 3,14 . 100
V = 314 cm³