Answer :
[tex] 3ft^{3} [/tex]
[tex]1ft = 12 inches[/tex]
[tex]1^{3}ft^{3} = 12^{3} inches^{3} [/tex]
and
[tex]1ft ^{3} = 1728inches^{3} [/tex]
meaning that
[tex] 3ft^{3} = 3 * 1728 inches^{3} [/tex]
finally
[tex]3ft^{3} = 5184 inches^{3} [/tex]
[tex]1ft = 12 inches[/tex]
[tex]1^{3}ft^{3} = 12^{3} inches^{3} [/tex]
and
[tex]1ft ^{3} = 1728inches^{3} [/tex]
meaning that
[tex] 3ft^{3} = 3 * 1728 inches^{3} [/tex]
finally
[tex]3ft^{3} = 5184 inches^{3} [/tex]