Nansi ithebula elungisiweyo: Ipherimitha = 2 × (ubude + ubuvundla).

The table you've provided shows correct calculations for the perimeter of each rectangle. All the values for "Ipherimitha ngama-mm" (Perimeter in mm) are accurate based on the given lengths and widths.

Here's a verification of each row's calculation:

Row 1:

• Ubude (Length): $30 \text{ mm}$
• Ukuvundla (Width): $20 \text{ mm}$

$$\text{Ipherimitha} = 2 \times (30 \text{ mm} + 20 \text{ mm}) = 2 \times 50 \text{ mm} = \boxed{\text{100 mm}}$$

✅ Correct.

Row 2:

• Ubude (Length): $20 \text{ cm} = 200 \text{ mm}$
• Ukuvundla (Width): $2 \text{ cm} = 20 \text{ mm}$

$$\text{Ipherimitha} = 2 \times (200 \text{ mm} + 20 \text{ mm}) = 2 \times 220 \text{ mm} = \boxed{\text{440 mm}}$$

✅ Correct.

Row 3:

• Ubude (Length): $5 \text{ cm} = 50 \text{ mm}$
• Ukuvundla (Width): $7 \text{ cm} = 70 \text{ mm}$

$$\text{Ipherimitha} = 2 \times (50 \text{ mm} + 70 \text{ mm}) = 2 \times 120 \text{ mm} = \boxed{\text{240 mm}}$$

✅ Correct.

Row 4:

• Ubude (Length): $100 \text{ mm}$
• Ukuvundla (Width): $50 \text{ mm}$

$$\text{Ipherimitha} = 2 \times (100 \text{ mm} + 50 \text{ mm}) = 2 \times 150 \text{ mm} = \boxed{\text{300 mm}}$$

✅ Correct.

Row 5:

• Ubude (Length): $130 \text{ mm}$
• Ukuvundla (Width): $40 \text{ mm}$

$$\text{Ipherimitha} = 2 \times (130 \text{ mm} + 40 \text{ mm}) = 2 \times 170 \text{ mm} = \boxed{\text{340 mm}}$$

✅ Correct.

All calculations in the table are correct.