An inch is EXACTLY 2.54 centimetres. You do the math.
20inches
20inches
25% increase.
A ruler is generally twelve inches long. 1 2/3 rulers should be about 20 inches.
20 inches = 50.8 cm
About 20inches
20inches
The area is 314.2 square inches.
20 inches x 28 inches is 3,612.896 square centimeters.
You add up the lengths of every side. For example, if you have a pentagon (five sided figure) and every side is 4 inches long, you add 4+4+4+4+4=20inches.
18.15 in x 32 in x 20 in = 11840 in3
Multiply width by length to get the area. The answer would be 800 square inches and 5.56 square feet.