Inch is a length unit not an area unit.
about 18 inches
The US coin "quarter" (25 cents) is 0.955" in diameter, 0.069 inches thick
It is 40 inches. You have not given us anything to compare it to, so we can't really answer your question.
3 x 4 inches
A US $20 bill (and, indeed, all US bills) measures 6.14 inches by 2.61 inches by 0.0043 inches thick (155.956mm by 66.294mm x 0.10922mm), and weighs 1 gram.
A number 10 can is 6 1/4 inches in diameter and 7 inches tall. This is about 215 cubic inches, or 119 fluid ounces US. this is 1 fluid ounce less than 15 US cups.
It is 0.31 inches. If you would like to convert inches into some other unit of measurement, you need to tell us what you want to convert it to.
83 inches is around 7 feet. Or, 21 meters. That is enormous. No coin in the history of the United States has been that big. Do you mean 8.3 inches?
about 1.2 inches.
1771.65 inches.
It is about 83 inches
The US coin "quarter" (25 cents) is 0.955" in diameter, 0.069 inches thick