Find the Surface Area box (L)(L)(H)

 h=Ll=Lw=H

The surface area of a box is equal to the sum of the areas of each side of the box.

2⋅(length)⋅(width)+2⋅(length)⋅(height)+2⋅(width)⋅(height)

Substitute the values of the length l=L, the width w=H, and the height h=L into the formula.

2⋅L⋅H+2⋅L⋅L+2⋅H⋅L

Multiply L by L by adding the exponents.

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Move L.

2LH+2⋅(L⋅L)+2⋅H⋅L

Multiply L by L.

2LH+2⋅L2+2⋅H⋅L

2LH+2L2+2HL

Add 2LH and 2HL.

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Move L.

2L2+2HL+2HL

Add 2HL and 2HL.

2L2+4HL

Find the Surface Area box (L)(L)(H)