Answer:
[tex]252 \: {m}^{2} [/tex]
Step-by-step explanation:
Two Squares area:
[tex]2 \times (6 \times 3) = 36 \: {m}^{2} [/tex]
1 Square perimeter:
[tex]2 \times (6 + 3) = 18 \: m[/tex]
Lateral area:
[tex](18 \times 12) = 216 \: {m}^{2} [/tex]
Total area:
[tex](216 + 36) \: = 252 \: {m}^{2} [/tex]
