90 L mixture, 15% water. Water added to make 40%: MCQ with Answer and Explanation

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90 L mixture, 15% water. Water added to make 40%:

A. 36 L

B. 33.75 L

C. 37.5 L

D. 40 L

Answer: Option C

Solution (By JKSSB Mock Tests)

Water=13.5 L, milk=76.5 L. For milk 60%, total = 76.5/0.6 = 127.5 L, add 37.5 L.

This question belongs to: Maths Percentage

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Practice More Percentage Questions

Question #1

A population increases by 5% yearly. Its present population is 88,200. What was it 2 years ago?

A. 82000

B. 80000

C. 84000

D. 78000

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Correct Answer: Option B

Explanation:
P_past = 88200 / (1.05)^2 = 88200 / 1.1025 = 80000.

This question belongs to: Maths Percentage

Question #2

The population of a town is 20,000. It increases by 5% annually. What will be the population after 2 years?

A. 22100

B. 21000

C. 22000

D. 22050

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Correct Answer: Option D

Explanation:
Population = 20000 * (1.05)^2 = 20000 * 1.1025 = 22050.

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Question #3

Price increased 15% then 10%. Single equivalent increase:

A. 25%

B. 27%

C. 26.5%

D. 24.5%

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Correct Answer: Option C

Explanation:
1.15 × 1.1 = 1.265, increase 26.5%.

This question belongs to: Maths Percentage

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