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= 12³
= 1728 cm³
V balok = V kubus
V balok = PLT
1728 = P * 9 * 8
1728 = 72P
P = 1728 / 72
P = 24 cm
vol kubus = s s s
=12 12 12
=1728 cm^3
vol balok= p l t
1728=p 9 8
1728= 72p
p= 1728/72
p=24 cm
Jadi panjang balok tersebut= 24 cm