ANSWER
[tex]14.4\pi ft^2[/tex]
EXPLANATION
The surface area of a cone is given as:
[tex]SA=\pi\cdot r(r+l)[/tex]
where r = radius; l = slant height
From the question:
[tex]\begin{gathered} r=2.4ft \\ l=3.6ft \end{gathered}[/tex]
Therefore, the surface area of the cone, in terms of pi, is:
[tex]\begin{gathered} SA=\pi\cdot2.4(2.4+3.6) \\ SA=\pi\cdot2.4\cdot6 \\ SA=14.4\pi ft^2 \end{gathered}[/tex]
