If a:b = 6:5 and b:c = 5:11, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 6:5 and b:c = 5:11, then a:b:c = ?

A. 5:5:12

B. 6:6:11

C. 12:10:22

D. 6:5:11

Answer: Option D

Solution (By JKExamLibrary)

Combine ratios: a:b = 6:5, b:c = 5:11 ⇒ a:b:c = 6:5:11.

This question belongs to: Maths Ratio and Proportion

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Question #1 Report Error

If a:b = 6:9 and b:c = 9:10, then a:b:c = ?

A. 6:10:10

B. 12:18:20

C. 6:9:10

D. 5:9:11

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Correct Answer: Option C

Explanation:
Combine ratios: a:b = 6:9, b:c = 9:10 ⇒ a:b:c = 6:9:10.

This question belongs to: Maths Ratio and Proportion

Question #2 Report Error

Two numbers are in ratio 9:5. Their difference is 112. What is their sum?

A. 210

B. 448

C. 420

D. 569

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Correct Answer: Option C

Explanation:
Numbers 9k, 5k. Difference |9-5|k = 112 ⇒ k = 28. Sum = (9+5)k ≈ 420.

This question belongs to: Maths Ratio and Proportion

Question #3 Report Error

If a:b = 8:10 and b:c = 10:6, then a:b:c = ?

A. 8:11:6

B. 16:20:12

C. 8:10:6

D. 7:10:7

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Correct Answer: Option C

Explanation:
Combine ratios: a:b = 8:10, b:c = 10:6 ⇒ a:b:c = 8:10:6.

This question belongs to: Maths Ratio and Proportion

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