It is 20 times 62 = 1240 square inches
(3.10 inch) squared = 9.61 square inches = 62 square centimeters (3.10 square inches) = 20 square centimeters. (both very slightly rounded)
If you mean how many square feet are in a rectangle 62 inches by 40 inches, then there would be 17.22 square feet.
You can not convert that as 20 inches are LENGTH and Square Feet is AREA If you meant 20 square inches however then... 1 square foot is 12 * 12 or 144 square inches. so 20 square inches would be 20/144 or 0.139 square feet
Each side is 20 inches. 20 x 20 = 400 square inches.
77 in * 62 in = 4774 sq inches = 4774/144 = 33.153 sq ft
144 square inches = 1 square foot20 square inches = 20/144 = 0.1389 square foot (rounded)
One square inch is equal to 2.542 = 6.4516 square centimetres. Therefore, 20 square inches is equal to 20 x 6.4516 = 129.032 square centimetres.
One square foot is 144 square inches. So 20 square inches is much smaller.
If the area of a circle is 20 square inches the diameter is: 5.046 inches.
20/12*20/12 = 25/9 square feet
Area rectangle: 20 times 40 = 800 square inches
62 square feet.