A mixture contains 25% alcohol. In 80 litres, amount of alcohol is: MCQ with Answer and Explanation

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A mixture contains 25% alcohol. In 80 litres, amount of alcohol is:

A. 22 L

B. 16 L

C. 20 L

D. 18 L

Answer: Option C

Solution (By JKSSB Mock Tests)

25% of 80 = 20 litres.

This question belongs to: Maths Percentage

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Question #1

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Ratio 2:5, second part expressed as percentage of total is:

A. 65.5%

B. 70%

C. 60%

D. 71.43%

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Correct Answer: Option D

Explanation:
Second part = 5/(2+5) × 100 ≈ 71.43%.

This question belongs to: Maths Percentage

Question #2

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Cost article Rs. 200, marked up 40%, then 20% discount. Selling price:

A. 280

B. 240

C. 260

D. 224

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Correct Answer: Option D

Explanation:
Marked = 200×1.4 = 280, SP = 280×0.8 = 224.

This question belongs to: Maths Percentage

Question #3

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Radius of circle decreased 10%. Area decreases by:

A. 17%

B. 20%

C. 21%

D. 19%

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Correct Answer: Option D

Explanation:
Area multiplier = 0.9² = 0.81, decrease 19%.

This question belongs to: Maths Percentage

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