One side of the rectangle is 21 cm, and the adjacent one is 9 cm longer. find the perimeter and area of the rectangle.

The width of rectangle b is 21 centimeters.
The length of the rectangle a is 9 centimeters longer than the width.
Let’s find the length a of the rectangle:
a = 21 + 9 = 30 centimeters.
We calculate the perimeter of this figure using the formula P = 2a + 2b:
P = 2a + 2b = 2 * 30 + 2 * 21 = 60 + 42 = 102 centimeters.
We calculate the area of the rectangle using the formula S = a * b:
S = a * b = 30 * 21 = 630 cm2.
Answer: P = 102 centimeters, S = 630 cm2.