Respuesta :

Answer:

Step-by-step explanation:

a = 12 mm

Surface area of cube = 6a²

                                   = 6 * 12 * 12

                                   = 864 cubic mm

Answer

[tex] \sf \pink{As \: We \: Know,} \\ \\ \tt \: \color{pink}\leadsto \: Surface \: Area \: Of \: Cube \: = {6a}^{2} \\ \\ \tt \green{ \: Here; \: a = 12mm }\\ \\ \tt \: \color{green}Surface \: Area \: = {6 \times 12 \times 12}^{} \\ \\ \pink{\leadsto \: = 864 {mm}^{3} }[/tex]

Hence , The Answer is 864mm³.