lateral area
[tex]A=Ph[/tex]
to find the missing side of the triangle we have
[tex]\begin{gathered} 3^2+8^2=x^2 \\ 9+64=x^2 \\ 73=x^2 \\ x=\sqrt[]{73} \\ x=8.5 \end{gathered}[/tex]
so,
[tex]\text{Alateral}=(3+8+8.5)\times9.1=19.5\times9.1=177.45m^2[/tex]
answer: 177.45 sq m
surface area
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