A rectangle has a width 3 times less than its length. The width of this rectangle is 4 cm.

A rectangle has a width 3 times less than its length. The width of this rectangle is 4 cm. Find the perimeter and area of the rectangle.

1. If this rectangle has a width three times less than its length, then, accordingly, the length will be three times greater than its width:

4 x 3 = 12 (cm).

2. Knowing the length and width of the rectangle, it is easy to calculate its perimeter, which is equal to the sum of twice the width and twice the length:

2 x 4 + 2 x 12 = 8 + 24 = 32 (cm).

3. Next, we calculate the area of this rectangle, which is equal to the product of length and width:

12 x 4 = 48 (cm²).

Answer: the perimeter of this rectangle is 32 cm, and the area is 48 cm².