The answer is 24 square feet.
[tex]sa =surface \: area[/tex]
[tex]sa \: \: \: {of cube}= l \times w \times 6[/tex]
[tex]l = 2 \: ft \\ w = 2ft[/tex]
[tex]l \times w = 4[/tex]
[tex]2 \times 2 = 4[/tex]
[tex](l \times w) \times 6[/tex]
[tex](2 \times 2) \times 6[/tex]
[tex](4) \times 6[/tex]
[tex] = 24 \: square \: \: feet[/tex]
