Karla is covering a box that is 24 centimeters long, 12 centimeters wide, and 8 centimeters high. How many square centimeters of cloth will she need?

Solution:

Area 1 = 24 x 12 = 288 cm^2  x 2 faces = 576 cm^2

Area 2 = 24 x 8 = 192 cm^2 x 2 faces = 384 cm^2

Area 3 = 12 x 8 = 96 cm^2 x 2 faces = 192 cm^2

576 + 384 + 192 = 1152 cm^2