In 60 L of milk-water mixture, water is 10%. How much water must be added to make water 25%? MCQ with Answer and Explanation

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In 60 L of milk-water mixture, water is 10%. How much water must be added to make water 25%?

A. 8 L

B. 10 L

C. 6 L

D. 12 L

Answer: Option D

Solution (By JKSSB Mock Tests)

Water = 6 L, milk = 54 L. For water 25%, milk 75%, total = 54/0.75 = 72 L, add 12 L.

This question belongs to: Maths Percentage

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Question #1

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In a mixture of 80 litres, the ratio of milk to water is 3:2. How much water must be added to make the ratio 1:2?

A. 64 L

B. 60 L

C. 72 L

D. 80 L

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Correct Answer: Option B

Explanation:
Milk = 48 L, water = 32 L. For milk:water = 1:2, water needed = 96 L, add 64 L? Wait, 48:96 = 1:2, so add 64 L. Option B 64 L. So answer B.

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Question #2

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Cost of 20 items = SP of 15 items. Profit %:

A. 40%

B. 33.33%

C. 30%

D. 25%

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Correct Answer: Option B

Explanation:
Profit = (5/15)×100 = 33.33%.

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Question #3

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If 20% of a number is added to another number, the second number increases by 50%. What is the ratio of the first number to the second number?

A. 5:2

B. 1:2

C. 2:1

D. 2:5

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Correct Answer: Option A

Explanation:
Let first = x, second = y. 0.2x + y = 1.5y → 0.2x = 0.5y → x/y = 0.5/0.2 = 5/2. Ratio = 5:2.

This question belongs to: Maths Percentage

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