What is its volume when full? Find the capacity in litres when half full?

The formula for the area of a trapezoid is $A = \frac{1}{2}(a+b)h$, where $a$ and $b$ are the lengths of the parallel sides and $h$ is the perpendicular height.
Here, $a = 16 \text{ cm}$, $b = 24 \text{ cm}$, and $h = 17 \text{ cm}$.

$$A_{base} = \frac{1}{2}(16 \text{ cm} + 24 \text{ cm})(17 \text{ cm})$$ $$A_{base} = \frac{1}{2}(40 \text{ cm})(17 \text{ cm})$$ $$A_{base} = 20 \text{ cm} \times 17 \text{ cm}$$ $$A_{base} = 340 \text{ cm}^2$$

The formula for the volume of a prism is $V = A_{base} \times \text{Length}$.
Here, $A_{base} = 340 \text{ cm}^2$ and Length $= 60 \text{ cm}$.

$$V_{full} = 340 \text{ cm}^2 \times 60 \text{ cm}$$ $$V_{full} = 20400 \text{ cm}^3$$

The volume when full is $\boxed{\text{}20400 \text{ cm}^3\text{}}$

$$V_{half} = \frac{1}{2} \times V_{full}$$ $$V_{half} = \frac{1}{2} \times 20400 \text{ cm}^3$$ $$V_{half} = 10200 \text{ cm}^3$$

We know that $1 \text{ litre} = 1000 \text{ cm}^3$.

$$\text{Capacity in litres} = \frac{V_{half}}{1000 \text{ cm}^3/\text{litre}}$$ $$\text{Capacity in litres} = \frac{10200 \text{ cm}^3}{1000 \text{ cm}^3/\text{litre}}$$ $$\text{Capacity in litres} = 10.2 \text{ litres}$$

The capacity when half full is $\boxed{\text{}10.2 \text{ litres}\text{}}$