16 cm
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The answer is 20cm
20 centimetres
1 foot = 30.54cm so 80cm = 2.62 feet or 2 ft 7.44 inches
5.0463 cm is. (rounded) (Note: "80cm" is not an area. "80cm2" is, and was assumed for the solution above.)
20% of 20% is 4% (=0.04)