[tex]\qquad\huge\underline{{\sf Answer}} ♨[/tex]
Total surface area :
[tex]\qquad \sf \dashrightarrow \:2(lw + wh + lh)[/tex]
[ l = Length, w = width, h = height ]
[tex]\qquad \sf \dashrightarrow \:2 \{(6 \times 2) + (2 \times 3) + (6 \times 3) \}[/tex]
[tex]\qquad \sf \dashrightarrow \:2 \{12 + 6+ 18\}[/tex]
[tex]\qquad \sf \dashrightarrow \:2 (36)[/tex]
[tex]\qquad \sf \dashrightarrow \:72 \: ft {}^{2} [/tex]
