# How do you find the surface area of a closed rectangular box given Length=6, Width=5, Height=3?

May 29, 2017

The surface area is $126$.
$2 \cdot \left(6 \cdot 5 + 3 \cdot 5 + 3 \cdot 6\right)$
$= 2 \cdot 63$
$= 126$