Question14 Mark for Review As \begin{tabular}{|l|l|l|l|} \hline & & & \\ \hline & & & \\ & & & \\ & & & \\ \hline$x$ & & & \\ \hline$x$ & & & \\ \hline$x$ \end{tabular}
The figure above represents a square sheet of cardboard with side length 20 inches. The sheet is cut and pieces are discarded. When the cardboard is folded, it becomes a rectangular box with a lid. The pattern for the rectangular box with a lid is shaded in the figure. Four squares with side length $x$ and two rectangular regions are discarded from the cardboard. Which of the following statements is true? (The volume $V$ of a rectangular box is given by $V=l w h$. .)