Answer:
[tex]642in^{2}[/tex]
Step-by-step explanation:
So, the area of the rectangular box is [tex]684in^{2}[/tex] which means that that's how much wrapping paper you require.
Formula for total surface area:
[tex]2(lb+bh+lh)[/tex]
Wherein:
l = length
b = breadth
h = height
Substituting the following values,
[tex]2[(19*12)+(12*3)+(3*19)][/tex]
= 642
