Answer
$A=240 \text{ } ft^2$
Work Step by Step
Using the formula for the area of a triangle which is given by $A=\dfrac{1}{2}bh,$ the area of a triangle with $h=30$ and $b=16$ is
\begin{array}{l}\require{cancel}
A=\dfrac{1}{2}bh
\\\\
A=\dfrac{1}{2}(16)(30)
\\\\
A=\dfrac{1}{\cancel2}(\cancel2\cdot8)(30)
\\\\
A=240 \text{ } ft^2
.\end{array}
