tolong cariin 'luas permukaannya' donk kak.. itu aja terima kasih

Lp =
2x pxt = 2x 12 x 3 = 2x 36 = 72
2x pxl = 2x 12 x 14 = 2x 168 = 336
2x lxt =2x 14 x 3 = 2x 42 = 84
= 72+336+84 = 492 cm²

(12×3)×2 + (14×3)×2 + (12×14)×2 =
= 36×2 + 42×2 + 168×2
= 72 + 84 + 336
= 156 + 336
= 492 Cm²

Semoga bisa membantu :)