The problem involves calculating the surface area of different types of leaves given their length (L) and breadth (B). The formula for surface area is provided as $0.5 \times L \times B$. We need to compute the surface area for each leaf type. However, the values for breadth (B) are missing from the table in the image. Because of the missing data, I can only provide the general formula.

1. Problem Description

The problem involves calculating the surface area of different types of leaves given their length (L) and breadth (B). The formula for surface area is provided as $0.5 \times L \times B$. We need to compute the surface area for each leaf type. However, the values for breadth (B) are missing from the table in the image. Because of the missing data, I can only provide the general formula.

2. Solution Steps

The general formula to calculate the surface area is:

$Surface Area = 0.5 \times L \times B$

Where $L$ is the length and $B$ is the breadth of the leaf.

3. Final Answer

Since the values for breadth (B) are missing, it is not possible to compute the surface area for each leaf type. To calculate the surface area, we need the length and breadth for each leaf. For example, if for leaf 1, the breadth was 10, then the surface area would be $0.5 \times 80 \times 10 = 400$ $mm^2$. The general formula is provided above, but the exact surface area can not be calculated without breadth values.