The area of the rectangle is 1 dm2 and the width is 8 cm. Calculate the perimeter of the rectangle.

The first step is to convert centimeters to decimeters. 1 dm = 10 cm. Thus, 8 cm = 8/10 = 0.8 dm. The area of the rectangle is equal to the product of the length and the width. Let’s calculate what the length is, knowing that the area is 1 square meter. dm, and the width is 0.8 dm.

a = 1 / 0.8 = 1.25 dm.

Let’s calculate what the perimeter of a rectangle is equal to 1.25 dm long and 0.8 dm wide. The perimeter of a rectangle is twice the sum of its length and width.

P = 2 * (1.25 + 0.8) = 2 * 2.05 = 4.1 dm.

Answer: 4.1 dm.