Find the area and perimeter of a rectangle that is 7cm long, which is 3cm more than its width?

Width – 3 cm less than the length (by condition).
Length – 7 cm (on condition).
We find the width of this rectangle – we subtract the number 3 from the length, we get:
7 – 3 = 4 cm – width.
The perimeter is the sum of all sides. Since the rectangle has two equal lengths and two equal widths, we get:
P = 4 + 4 + 7 + 7 = 22 cm.
Area is the product of the length and width of a shape, in this case a rectangle. That is, you need to multiply its length (7 cm) and its width (4 cm).
S = 4 * 7 = 28 cm².
Answer: 22 cm – perimeter; 28 cm² – area.