Solve the following questions: 2.1.2, 2.1.3, 2.2.1, and 2.2.2.

The total mass of strawberry puree in a tin is 450 g.
Each portion is 30 g.
To find the number of portions, divide the total mass by the mass per portion:

$$\text{Number of portions} = \frac{\text{Total mass}}{\text{Mass per portion}}$$ $$\text{Number of portions} = \frac{450 \text{ g}}{30 \text{ g/portion}}$$ $$\text{Number of portions} = 15 \text{ portions}$$

The correct option is C.

Michelle's dad will be 60 years old on 2 May 2023.
To find his birth year, subtract his age from the current year:

$$\text{Birth year} = \text{Current year} - \text{Age}$$ $$\text{Birth year} = 2023 - 60$$ $$\text{Birth year} = 1963$$

The correct option is A.

Capacity refers to the maximum amount of a substance that a container can hold.

• Option A describes volume, which is the amount of space occupied by an object.
• Option B is incorrect as capacity relates to three-dimensional space.
• Option C accurately describes capacity as the amount of space that can be contained by a substance. The correct option is C.

The diameter of the tank is given as $1\,128$ cm.
The radius is half of the diameter:

$$\text{Radius} = \frac{\text{Diameter}}{2}$$ $$\text{Radius} = \frac{1\,128 \text{ cm}}{2}$$ $$\text{Radius} = 564 \text{ cm}$$

The correct option is B.

The circumference of a circle can be calculated using two main formulas:

1. $C = 2 \times \pi \times \text{radius}$
2. $C = \pi \times \text{diameter}$ Comparing these to the given options:

• Option A: $\pi \times \text{radius}$ is incorrect.
• Option B: $2 \times \pi \times \text{radius}$ is a correct formula.
• Option C: $2 \times \pi \times \text{diameter}$ is incorrect (it should be $\pi \times \text{diameter}$). The correct option is B.

The capacity of the tank is $1\,500$ litres.
To convert litres to millilitres, use the conversion factor $1 \text{ L} = 1\,000 \text{ ml}$.

$$\text{Capacity in ml} = 1\,500 \text{ L} \times 1\,000 \text{ ml/L}$$ $$\text{Capacity in ml} = 1\,500\,000 \text{ ml}$$

The correct option is A.

Final Answers:
2.1.2. The correct option is C.
2.1.3. The correct option is A.
2.2.1. The correct option is C.
2.2.2. The correct option is B.
2.2.3. The correct option is B.
2.2.4. The correct option is A.