h=5.6cml=12cmw=10cm

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=12, the width w=10, and the height h=5.6 into the formula.

2⋅12⋅10+2⋅12⋅5.6+2⋅10⋅5.6

Multiply 2 by 12.

24⋅10+2⋅12⋅5.6+2⋅10⋅5.6

Multiply 24 by 10.

240+2⋅12⋅5.6+2⋅10⋅5.6

Multiply 2 by 12.

240+24⋅5.6+2⋅10⋅5.6

Multiply 24 by 5.6.

240+134.4+2⋅10⋅5.6

Multiply 2 by 10.

240+134.4+20⋅5.6

Multiply 20 by 5.6.

240+134.4+112

240+134.4+112

Add 240 and 134.4.

374.4+112

Add 374.4 and 112.

486.4

486.4(cm)2

Find the Surface Area box (5.6cm)(12cm)(10cm)