How do you find the surface area of rectangular box?

Answer 1

A rectangular box has six sides. Find the area of them and add them together. Two sides are length times height, two sides are length times width, and two sides are width times height.

Surface Area = 2LH + 2LW + 2WH

Answer 2

A rectangular box is bounded by six rectangles. Find the area of each of the six rectangles, then add everything together. If the side lengths are "a", "b", and "c", that would give you:ab + ab + ac + ac + bc + bc

which can be simplified to

2(ab + ac + bc)

Answer 3

To find the surface area of a rectangle, multiply one side by the opposing side.