Skin usually covers about 2 square meters.
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you need 600 brick for a single skin wall 1 square meter and 1200 for a double skin wall
The word "skin" occurs 77 times in 66 verses in the KJV bible.
Correct answer can not be given for the above question. As number of bacteria varies from person to person. In the same person at different times, say before bath and after bath. Bacteria are more in axilla and groin, as compared to uncovered area.
There are virtually an infinite amount of different skin colours that exist since the possibilities of shades are infinite.