Given data:
The first base length is b=4.3 in.
The second base length is b'=5.4 in.
The third base lenght is b''=8.4 in.
The height is h=4.1 in.
The expression for the lateral surface area is,
[tex]A=(b+b^{\prime}+b^{\doubleprime})h[/tex]
Substitute the given values in the above expression.
[tex]\begin{gathered} A=(4.3\text{ in+5.4 in+8.4 in)(4.1 in)} \\ =(18.1\text{ in)(4.1 in)} \\ =74.21in^2 \end{gathered}[/tex]
Thus, the lateral surface area is 74.21 square-inches.
