The area of the rectangle is 54 dm2, its width is 60 cm. Find the perimeter of this rectangle.

54 dm2 = 54 * 10 cm = 540 cm2 – the area of a rectangular figure.

Next, we compose an equation with which we calculate the length of the rectangle, denoting it by x.

Remember also that area is length times width.

x * 60 = 540.

We are looking for an unknown factor, according to the rule:

x = 540/60.

x = 9 centimeters – is the length of a rectangular shape.

Next, let’s calculate the perimeter – the sum of all four sides of the rectangle.

P = 60 cm + 60 cm + 9 cm + 9 cm = 120 cm + 18 cm = 138 cm.

Bottom line: perimeter – 138 cm.