If 23 litres of water is utilised by 69 people, how many litres of water will be needed for 1890 people in similar circumstances?

Answer

To solve the problem of how many litres of water will be needed for 1890 people, we can follow these steps:

### Step-by-Step Solution:

1. **Determine the amount of water used per person**:
- We know that 23 litres of water is used by 69 people.
- To find out how much water is used by one person, we divide the total amount of water by the number of people:
\[ \text{Water per person} = \frac{23 \text{ litres}}{69 \text{ people}} = \frac{23}{69} \text{ litres} \]

2. **Simplify the fraction**:
- We can simplify \(\frac{23}{69}\):
\[ \frac{23}{69} = \frac{1}{3} \text{ litres per person} \]
- This means each person uses \(\frac{1}{3}\) litre of water.

3. **Calculate the total water needed for 1890 people**:
- Now, to find out how much water is needed for 1890 people, we multiply the amount of water used per person by the total number of people:
\[ \text{Total water needed} = 1890 \text{ people} \times \frac{1}{3} \text{ litre/person} \]
- Performing the multiplication:
\[ \text{Total water needed} = 1890 \times \frac{1}{3} = 630 \text{ litres} \]

### Final Answer:
Thus, the total amount of water needed for 1890 people is **630 litres**.