In a mixture of 120 litres, the ratio of milk and water is 2:1. How much water is added to change the ratio to 1:2? MCQ with Answer and Explanation

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In a mixture of 120 litres, the ratio of milk and water is 2:1. How much water is added to change the ratio to 1:2?

A. 130 L

B. 120 L

C. 110 L

D. 100 L

Answer: Option B

Solution (By JKSSB Mock Tests)

Milk=80, water=40. For 1:2, water=160, add 120 L.

This question belongs to: Maths Percentage

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Employees reduced in ratio 9:8, wages increased in ratio 14:15. Wage bill ratio:

A. 14:15

B. 21:20

C. 20:21

D. 15:14

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Correct Answer: Option B

Explanation:
Initial bill = E×W, final = (8/9 E)×(15/14 W) = 20/21 of initial, ratio 21:20.

This question belongs to: Maths Percentage

Question #2

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Population increases 6% annually. Present 1,50,000, after 2 years population:

A. 1,65,000

B. 1,70,000

C. 1,75,000

D. 1,68,540

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Correct Answer: Option D

Explanation:
1,50,000 × 1.06² = 1,68,540.

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Question #3

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Fresh fruit has 72% water, dry fruit 25% water. Dry fruit from 120 kg fresh fruit:

A. 50 kg

B. 42 kg

C. 44.8 kg

D. 48 kg

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Correct Answer: Option C

Explanation:
Dry matter in fresh = 28% of 120 = 33.6 kg, in dry fruit 75% is dry matter, weight = 33.6/0.75 = 44.8 kg.

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