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A milkman adds 500 ml of water to each litre of milk he has in a container. He sells 30 litres of mixture from container and adds 10 litres milk in the remaining. The ratio of milk and water in the final mixture is 11:5. Find the initial quantity of milk in the container.
  • a)
    100 litres
  • b)
    120 litres
  • c)
    150 litres
  • d)
    180 litres
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
A milkman adds 500 ml of water to each litre of milk he has in a conta...
Let initial quantity of milk be 10x
After adding water, total quantity =15x
quantity of milk =10x
After selling 30 litre of mixture and adding 10 litre milk, total quantity =(15x – 30 + 10) = (15x−20)

Initial quantity of milk in the container = 10x = 120litres
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Most Upvoted Answer
A milkman adds 500 ml of water to each litre of milk he has in a conta...
Given:
- A milkman adds 500 ml of water to each litre of milk he has in a container.
- He sells 30 litres of mixture from the container and adds 10 litres of milk to the remaining.
- The ratio of milk and water in the final mixture is 11:5.

To find:
- The initial quantity of milk in the container.

Approach:
Let's assume that the initial quantity of milk in the container is 'x' litres.
So, the initial quantity of water will be (x*500) ml.
After adding water, the total quantity of mixture in the container will be (x + x*0.5) = (1.5x) litres.
When 30 litres of mixture is sold, the quantity of mixture left in the container will be (1.5x - 30) litres.
Now, 10 litres of milk is added to the remaining mixture, so the quantity of milk in the container becomes (x + 10) litres.
The final mixture has a ratio of milk and water as 11:5, which means that for every 11 units of milk, there are 5 units of water.
So, we can write the following equation based on the given information:

(11/16)*(x+10) = x [dividing by 16 to convert litres to units]

Solving this equation, we get x = 120 litres.

Therefore, the initial quantity of milk in the container was 120 litres.

Answer: Option B (120 litres)
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A milkman adds 500 ml of water to each litre of milk he has in a container. He sells 30 litres of mixture from container and adds 10 litres milk in the remaining. The ratio of milk and water in the final mixture is 11:5. Find the initial quantity of milk in the container.a)100 litresb)120 litresc)150 litresd)180 litresCorrect answer is option 'B'. Can you explain this answer?
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