A tailor needs to make three dresses for children aged 6, 7, and 10 years. The material required for each dress is 3m, 4.5m, and 5m respectively. The cost of the material is R120.50 per metre. Additio

The material needed for each dress is:

• 6-year-old dress: 3 metres
• 7-year-old dress: 4.5 metres
• 10-year-old dress: 5 metres

$$\text{Total material} = 3 \text{ m} + 4.5 \text{ m} + 5 \text{ m} = 12.5 \text{ m}$$

The total metres of material needed is 12.5 metres.

$$\boxed{12.5 \text{ metres}}$$

The total material needed is 12.5 metres (from Q3.1).
The material costs R120.50 per metre.

$$\text{Material cost} = 12.5 \text{ m} \times \text{R}120.50/\text{m} = \text{R}1506.25$$

The material cost for the three dresses is R1506.25.

$$\boxed{\text{R}1506.25}$$

Nkgono uses 3 rolls of cotton per dress.
Each roll is 4 metres long.

$$\text{Length in metres} = 3 \text{ rolls} \times 4 \frac{\text{m}}{\text{roll}} = 12 \text{ m}$$

Given that 1 metre = 100 centimetres.

$$\text{Length in centimetres} = 12 \text{ m} \times 100 \frac{\text{cm}}{\text{m}} = 1200 \text{ cm}$$

The length of the embroidery cotton for one dress is 1200 cm.

$$\boxed{1200 \text{ cm}}$$

She uses 3 rolls of cotton per dress.
There are 3 dresses (one of each size mentioned).

$$\text{Total rolls} = 3 \frac{\text{rolls}}{\text{dress}} \times 3 \text{ dresses} = 9 \text{ rolls}$$

Each roll of embroidery cotton costs R15.25.

$$\text{Total cost} = 9 \text{ rolls} \times \text{R}15.25/\text{roll} = \text{R}137.25$$

The total amount she will pay for the embroidery cotton for the three dresses is R137.25.

$$\boxed{\text{R}137.25}$$

A 10-year-old dress requires 5 metres of material.
The material costs R120.50 per metre.

$$\text{Material cost} = 5 \text{ m} \times \text{R}120.50/\text{m} = \text{R}602.50$$

One dress uses 3 rolls of embroidery cotton.
Each roll costs R15.25.

$$\text{Embroidery cotton cost} = 3 \text{ rolls} \times \text{R}15.25/\text{roll} = \text{R}45.75$$

$$\text{Total cost} = \text{Material cost} + \text{Embroidery cotton cost}$$ $$\text{Total cost} = \text{R}602.50 + \text{R}45.75 = \text{R}648.25$$

The total cost of a dress for a 10-year-old is R648.25.

$$\boxed{\text{R}648.25}$$