a )
[tex]d = \sqrt{} l {}^{2} + l {}^{2} + h {}^{2} = \sqrt{116} [/tex]
[tex] \sqrt{4} + 6 {}^{2} + 8 {}^{2} = [/tex]
[tex] \sqrt{16} + 36 + 64 = \sqrt{116} [/tex]
b )
[tex]v = l \times l \times h = 4 \times 6 \times 8 = 192 {}^{3} cm[/tex]
[tex]at = 2(lh + lh + li) = [/tex]
[tex]2(32 + 48 + 24) = [/tex]
[tex] = 2 \times 136 = 272cm {}^{2} [/tex]
