0.000011m
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72m2
2x27x0.1=5.4 2x27=54 54x0.1=5.4
This is estimated to be 100 microns. There are 1000 microns in a millimetre. So in millimetres, a human hair is approx 0.1 millimetres in width.
If the acre is a square it would be 63.61 meters wide.
There endless choices for the answer.As one of them is 74.3 meters long and 10 meters wide.