800 jerrycans fill a tank. One jerrycan weighs 20 kg. How many litres does the tank hold? A bucket contains 45.6 litres of water. The empty bucket weighs 3 kg. (i) What is the mass of the full bucket?

Here are the solutions for problems 2 and 3.

:
"800 jerrycans fill a tank. One jerrycan weighs 20 kg. How many litres does the tank hold?"

Assumption: We assume that "One jerrycan weighs 20 kg" refers to the mass of the water contained in one jerrycan. We also use the density of water, where 1 kg of water has a volume of 1 litre.

Step 1: Determine the volume of water in one jerrycan.
Given that 1 kg of water is approximately 1 litre, if one jerrycan contains 20 kg of water, then its volume is 20 litres.

$$\text{Volume per jerrycan} = 20 \text{ kg} \times \frac{1 \text{ L}}{1 \text{ kg}} = 20 \text{ L}$$

Step 2: Calculate the total volume the tank holds.
The tank is filled by 800 jerrycans.

$$\text{Total volume} = \text{Number of jerrycans} \times \text{Volume per jerrycan}$$ $$\text{Total volume} = 800 \times 20 \text{ L}$$ $$\text{Total volume} = 16000 \text{ L}$$

The tank holds $\boxed{16000 \text{ litres}}$.

:
"A bucket contains 45.6 litres of water. The empty bucket weighs 3 kg."
"(i) What is the mass of the full bucket?"
"(ii) What is the volume of the water that fills the bucket in cm³?"