For question 24 .2.2 WHy not mutpliy 25 ×25

The $25 \text{ cm}$ refers to the additional length for the hem on the tablecloth. This value was used to determine the total diameter of the circular tablecloth that was cut.

For question 24.2.2, we needed to calculate the area of the original material from which the tablecloth was cut. The problem states the "Material size: $2.3 \text{ m}$". This means the material is a square with sides of $2.3 \text{ m}$.

Therefore, the area of the material is:

$$\text{Area of material} = \text{Side} \times \text{Side}$$ $$\text{Area of material} = 2.3 \text{ m} \times 2.3 \text{ m}$$ $$\text{Area of material} = 5.29 \text{ m}^2$$

The $25 \text{ cm}$ is not a dimension of the raw material itself, but rather an allowance for the finished tablecloth.