The width of the rectangle is 5 cm and the perimeter is 28 cm. Find the length and area of this rectangle.

Since a rectangle has two pairs of equal sides. Then we can find the two lengths of the rectangle and then calculate the length and area of the rectangle.

1) 28 – (5 * 2) = 28 – 10 = 18 (cm) two lengths of a rectangle;

2) 18: 2 = 9 (cm) one rectangle length;

3) 9 * 5 = 45 (cm ^ 2) area of the rectangle.

Answer: 9 cm is the length of the rectangle, 45 cm ^ 2 is the area of the rectangle.