Multiply them.
25 square cm
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the surface are of a cube that is 5 cm long, wide, and high is 150 cm^2. Each side of the box is a square measuring 5cm x 5cm, so each side has an area of 25 square cm. A box has six sides, so the total surface area of all six sides is 6 x 25 square cm = 150 square cm.
Just like any other rectangle.Multiply the length by the width.5cm x 5cm = 25 cm2
two surfaces 5cm x 5cm = 25 cm ea four surfaces 5cm x 6cm = 30 cm ea 25+25+30+30+30+30 = 180 cm
cm square x 0.0001 = meters square
We could really use that other dimension. A circle with a radius of 5cm has a 10cm diameter and can fit in a square that is 10 cm on each side. If the paper is 50 cm x 50 cm, there will be 25 of them.