If a:b = 4:10 and b:c = 10:10, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 4:10 and b:c = 10:10, then a:b:c = ?

A. 4:11:10

B. 8:20:20

C. 4:10:10

D. 3:10:11

Answer: Option C

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 4:10, b:c = 10:10 ⇒ a:b:c = 4:10:10.

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1

Milk and water are in ratio 6:5 in a 226 L mixture. Quantity of milk?

A. 246 L

B. 153 L

C. 103 L

D. 123 L

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Correct Answer: Option D

Explanation:
Total parts = 11. Milk = [6 / (6+5)] × 226 = 123 L.

This question belongs to: Maths Ratio and Proportion

Question #2

Ratio of present ages of A and B is 3:8. After 10 years, the ratio becomes 4:10. Present age of A is?

A. 102 years

B. 44 years

C. 56 years

D. 51 years

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Correct Answer: Option D

Explanation:
Let ages 3k and 8k. Then (3k + 10)/(8k + 10) = 4/10. Solving gives k ≈ 17, age of A = 3*17 = 51.

This question belongs to: Maths Ratio and Proportion

Question #3

Ratio of present ages of A and B is 4:8. After 6 years, the ratio becomes 5:10. Present age of A is?

A. 112 years

B. 52 years

C. 56 years

D. 61 years

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Correct Answer: Option C

Explanation:
Let ages 4k and 8k. Then (4k + 6)/(8k + 6) = 5/10. Solving gives k ≈ 14, age of A = 4*14 = 56.

This question belongs to: Maths Ratio and Proportion

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