bantu yaa tolong yaaa!!

diketahui volume kerucut
V = 12320
d = 56
r = 28
Pi = 22/7

maka
V = 1/3 . Pi . r² . t
12320 = 1/3 . 22/7 . 28 . 28 . t
12320 = 1/3 . 22 . 4 . 28 . t 
12320 = 821,333 . t
t = 12320 / 821,333
t = 15 cm