Width to width into a rectangle, the circumference is 20 cm longer than a single rectangle, and the length is:

20 ÷ 2 = 10 (cm)

From length to length to form a rectangle, the circumference is longer than that of a single rectangle12cm, and the width is:

12 ÷ 2 = 6 (cm)

The original rectangular area is:

10× 6 = 60 (square centimeter)