The length of the rectangle is 12cm, the width is 1/4 of the length, find the perimeter of the rectangle and calculate its area.

1) First of all, we will find the value of the width of the rectangle, provided that it is 1/4 of the length equal to 12 cm:

12: 4 * 1 = 3 cm.

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

P = 2a + 2b = 2 * 12 + 2 * 3 = 24 + 6 = 30 cm.

3) The area of the rectangle is calculated as follows:

S = a * b = 12 * 3 = 36 cm².