Tolong yaa plisss.. (No.22,25,26,27,28,29) Mohon bantuannya..

25.
Luas permukaan =
2 . ( pl + pt + lt )
2 . ( 150 + 180 + 120 )
2 . 450
900 cm2 ( d )
29.
Luas permukaan kubus =
L = 6 . S . S
384 = 6 . S2
S2 = 384 ÷ 6
= 64
S = /64
= 8 cm
V = r3
= 8×8×8
= 512