Fires produced by burning petrol are not extinguished by pouring water. Give reason.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Nature of the Fire**: Fires produced by burning petrol are classified as oil fires. Petrol is a type of flammable liquid that can ignite and burn.

2. **Properties of Water and Petrol**: It is important to note that petrol (and most oils) is less dense than water. This means that petrol will float on the surface of water instead of mixing with it.

3. **Behavior of Burning Petrol**: When water is poured onto a burning petrol fire, the water does not extinguish the flames. Instead, the petrol remains on the surface of the water and continues to burn.

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