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There are three vessels each of 20 litre capacity is filled with the mixture of milk and water. The ratio of milk and water are 2:3, 3:4 and 4:5 respectively. All the vessels are emptied into fourth vessel, then find the ratio of milk and water in the final mixture.
  • a)
    401/543
  • b)
    401/544
  • c)
    401/545
  • d)
    401/546
  • e)
    None of these
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
There are three vessels each of 20 litre capacity is filled with the m...
Answer – b) 401/544 Explanation : Milk = 2/5 + 3/7 + 4/9 and water = 3/5 + 4/7 + 5/9 so ratio will be 401/544
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There are three vessels each of 20 litre capacity is filled with the m...
Problem Analysis:

We are given three vessels of 20 litres capacity each filled with a mixture of milk and water in different ratios. We need to find the ratio of milk and water in the final mixture when all the three vessels are emptied into a fourth vessel.

Given:

- Three vessels of 20 litres capacity filled with mixtures of milk and water in the ratios of 2:3, 3:4, and 4:5 respectively.

To find:

- The ratio of milk and water in the final mixture when all the three vessels are emptied into a fourth vessel.

Solution:

Let us assume that the amount of milk and water in each vessel is proportional to the given ratios. Therefore, we can write:

- First vessel: Milk = 2x litres and Water = 3x litres
- Second vessel: Milk = 3y litres and Water = 4y litres
- Third vessel: Milk = 4z litres and Water = 5z litres

Now, when all the three vessels are emptied into a fourth vessel, the total amount of milk and water in the fourth vessel will be:

- Milk = 2x + 3y + 4z litres
- Water = 3x + 4y + 5z litres

We know that the total capacity of the fourth vessel is 60 litres (20 litres x 3 vessels). Therefore, we can write:

- Milk + Water = 60
- 2x + 3y + 4z + 3x + 4y + 5z = 60
- 5x + 7y + 9z = 60

Now, we need to find the ratio of milk and water in the final mixture. Therefore, we can write:

- Milk : Water = (2x + 3y + 4z) : (3x + 4y + 5z)
- Milk : Water = (2x + 3y + 4z) / (3x + 4y + 5z) : 1

Substituting the value of (5x + 7y + 9z) = 60, we get:

- Milk : Water = (2x + 3y + 4z) / (3x + 4y + 5z) : 1
- Milk : Water = (2x + 3y + 4z) / (5x + 7y + 9z - 2x - 3y - 4z) : 1
- Milk : Water = (2x + 3y + 4z) / (3x + 4y + 5z) : (5x + 7y + 9z - 2x - 3y - 4z) / (3x + 4y + 5z)
- Milk : Water = (2x + 3y + 4z) / (3x + 4y + 5z) : (3x + 3y + 4z) / (3x + 4y + 5z)
- Milk : Water = 2x + 3y + 4z : 3x + 3y + 4z
- Milk : Water = 2 : 3

Therefore, the ratio of
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