The surface area of an open-top box with length $\displaystyle {L}$, width $\displaystyle {W}$, and height $\displaystyle {H}$ can be found using the formula:

$\displaystyle {A}={2}{L}{H}+{2}{W}{H}+{L}{W}$

Find the surface area of an open-top box with length 4 cm, width 9 cm, and height 7 cm.

Preview Question 6   $\displaystyle \text{cm}^{{2}}$