The width of the rectangle is 150mm which is one third of its length find the perimeter of this rectangle

To solve this problem, remember that the perimeter of a rectangle is the sum of the lengths of all its sides. Since the opposite sides in a rectangle are equal, then P = 2 * (a + b), where a is the length, b is the width. We calculate what the length is, knowing that the width, which is 150 mm, is 1/3 of the length. To find a number based on its fractional part, you need to divide this number by a fraction.

150: 1/3 = 150 * 3 = 450 mm.

Let’s calculate the perimeter of the rectangle.

P = 2 * (150 + 450) = 2 * 600 = 1200 mm.

Answer: 1200 mm.