The length of the rectangle is 8 cm, the width is 3 cm less. Find the perimeter and area of the rectangle.

1. Find the width of the rectangle, which is 3 cm less than its length:
8 cm – 3 cm = 5 cm.
2. Find the perimeter and area of the rectangle by the formulas P = 2 * (a + b), S = a * b, where P is the perimeter of the rectangle, S is the area of a rectangle with length a, width b:
S = 8 * 5 = 40 cm2.
P = 2 * (8 + 5) = 2 * 13 = 26 cm.
Answer: the area of the rectangle is 40 cm2, and its perimeter is 26 cm.