Respuesta :

Answer:

SA = (3 x 12) + (3 x 4) = 36 + 12 = 48 cm²

Step-by-step explanation:

9 + 12 + 2(⁷/2) + 15 = 9 + 12 + 7 + 15 = 43 ===> surface area.

Hope to helpfull