1. **State the problem:** We are given a rectangle where the length is 20% more than the breadth, and the breadth is 20 cm. We need to find the area of the rectangle. 2. **Identify the variables:** Let the breadth be $b = 20$ cm. 3. **Express the length:** Since the length is 20% more than the breadth, the length $l$ is given by: $$ l = b + 0.20 \times b = 1.20b $$ 4. **Calculate the length:** Substitute $b = 20$ cm: $$ l = 1.20 \times 20 = 24 \text{ cm} $$ 5. **Formula for area of a rectangle:** $$ \text{Area} = l \times b $$ 6. **Calculate the area:** $$ \text{Area} = 24 \times 20 = 480 \text{ cm}^2 $$ **Final answer:** The area of the rectangle is $480$ square centimeters.