samaa caranya lhoo kakaaa, jangan ngarang lhoo, besok dikumpulinn.kakaaa yang baik tolong yaa

Kelas 8 Matematika
Bab Bangun Ruang

a] V = 1/3 . π . r . r . t
V = 1/3 . π . d/2 . d/2 . t
V = 1/3 . π . d² . t/4
V = 1/12 . π . d² . t

b] V = 1/3 . π . r . r . t
3V = π . r² . t
t = 3V/(π . r²)

c] V = 1/12 . π . d² . t
12 V = π . d² . t
d² = 12V / πt
d = √(12V/(πt))

d] V = 1/12 . π . d² . t
12 V = π . d² . t
t = 12 V / (π . d²)