Perimeter of the rectangle = 20 cm. Find the length of the rectangle if it is 2 cm wider.

1. Suppose the width of the rectangle is x cm.
2. Since the length of the rectangle is 2 cm longer than its width, therefore it is equal to (x + 2) cm.
3. Let’s make an equation and calculate what the width of the rectangle is if it is known that the perimeter is 20 cm. The perimeter is the sum of the lengths of all sides of the rectangle.
x + x + (x + 2) + (x + 2) = 20;
x + x + x + 2 + x + 2 = 20;
4x = 20 – 2 – 2;
4x = 16;
x = 16/4;
x = 4 cm.
4. Find what is the length of the rectangle.
4 + 2 = 6 cm.
Answer: The length of the rectangle is 6 cm.