tolong jawab yg benar yaa

L.p 1 ( kubus )
= 6 × S²
= 6 × 3²
= 6 × 9
= 54 cm²
L.p 2 ( balok )
= 2 × ( p × l + l × t + t × p )
= 2 × ( 8 × 3 + 3 × 12 + 12 × 8 )
= 2 × ( 24 + 36 + 96 )
= 2 × 156
= 312 cm²


L.p semua = 54 + 312 = 366 cm²

maaf kalo salah

luas permukaan 1 :
sxsx6 = 3x3x6 = 54 cm2

luas permukaan 2 :
2 x ( 8 x 3 ) + ( 3 x 12 ) + ( 8 x 12 )
2 x ( 24. + 36. + 96
2 x. 156
= 312 cm2

total luas permukaan = 54 + 312 = 366cm2

maaf kalau salah