If you are looking for the size of an area, the unit is Square Centi-Meter.
30.5cmx35.6cmx30.5cm=33116.9cm² (square centimeters)
also
331.169m² (square meters)
33.1169km² (square kilometers)
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This is a very interesting question. If 2km= 5cm, then the answer is 14 centimeters.
One foot is equal to 30.48 centimetres. Therefore, 14 feet is equal to 14 x 30.48 = 426.72 centimetres.
There are 2.54 centimetres in one inch. There are 12 inches in one foot. Therefore, 14 feet 10 inches is equal to (14 x 12 x 2.54) + (10 x 2.54) = 452.12 centimetres.
If it's 12 x 14 x 15, it's not a cube. The surface area of the object is 1116 square centimeters.
Area = 1/2*(14+12)*8 = 104 square cm