Calculate the perimeter of a rectangle whose width is 6 cm, and it is 2 times less than its length.

Recall that the perimeter of the rectangle (P) is equal to the sum of the lengths of all its sides: P = a + b + a + b = 2a + 2b, where a is the length of the rectangle, b is the width of the rectangle.

By the condition of the problem, the width of the rectangle is b = 6 cm.

Let’s calculate the length of the given rectangle:

a = 2b = 2 * 6 = 12 cm.

Find the perimeter of the rectangle:

P = 12 * 2 + 6 * 2 = 24 + 12 = 36 cm.

Answer: the perimeter of the rectangle is 36 cm.