The length of the rectangle is 1 4/20 m, and the width is 3/20 m less than the length. Find the perimeter of the rectangle.

1) Find the width of the rectangle, provided that it is 3/20 m less than the length equal to 1 4/20 m:

1 4/20 – 3/20 = 1 1/20 m.

2) The perimeter of such a figure is calculated by the formula:

P = 2a + 2b = 2 * 1 4/20 + 1 1/20. Let’s represent fractions as irregular ones:

P = 2 * 24/20 + 2 * 21/20 = 24/10 + 21/10 = 45/10 m.

Let’s take out the integer value:

4 5/10. Reduce and get: 4 1/2 m.

1 m = 100 cm, therefore 9/2 * 100 = 450 cm is the sum of the lengths of all sides of the rectangle.