The width of the rectangle is 3 times less than its length. Find the perimeter of the rectangle if its length is 12 cm.

1) Having reduced the length of the given rectangle by 3 times, we calculate its width:

12: 3 = 4 cm.

2) A rectangle is a figure with four sides, while the opposite sides are equal in pairs.

The perimeter of a rectangle is equal to the sum of the lengths of its four sides.

Let’s find the perimeter of a rectangle, in which the length of two sides is 12 cm, and the other two are 4 cm:

12 + 12 + 4 + 4 = 12 * 2 + 4 * 2 = 24 + 8 = 32 cm.

Answer: the perimeter of the given rectangle is 32 cm.