Question

8 liters are drawn from a barrel of petrol and is replaced with water. This operation is performed for total of 4times.
The ratio of petrol to water now in barrel is 16:65. How much petrol does the barrel hold initially?​

Answer 1

Answer:

130 litres of petrol

Step-by-step explanation:

here 8 litres 4 times is taken away so 32 litres is taken away so 32 litres of water 32:petrol=16:65

so we get 130 lt petrol

Answer 2

If 8 liters of petrol are drawn from the barrel and is replaced with water for a total of 4 times, the resulting contents of the barrel would be composed of 4/5 water and 1/5 petrol.

Each time 8 liters of petrol is removed and replaced with water, the amount of petrol in the barrel decreases and the amount of water increases. After 4 operations, the barrel would contain 4/5 water and 1/5 petrol, which represents a total of 32 liters of water and 8 liters of petrol.

It's worth noting that replacing a portion of the contents of a barrel in this way can have a significant effect on the quality and usefulness of the remaining contents. Petrol and water are immiscible, meaning they don't mix evenly and tend to separate, so the mixture of water and petrol in the barrel would likely not be homogeneous. This could lead to issues with the performance of engines or other equipment that uses the mixture, as the concentration of water in the mixture may vary over time.

Additionally, the presence of water in the petrol can cause problems with storage and transportation, as water can contribute to the formation of rust or corrosion in storage containers, and can lead to the growth of bacteria or other microorganisms that can degrade the quality of the mixture.

In general, it's not recommended to mix water with petrol or other fuels, and it's important to take steps to ensure that fuels remain free from water contamination. This may include using proper storage containers, regularly checking and removing any accumulated water, and using filtration or other treatments to remove water from fuel before it's used.

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