If a:b = 6:8 and b:c = 8:8, then a:b:c = ? MCQ with Answer and Explanation

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

A. 5:8:9

B. 12:16:16

C. 6:9:8

D. 6:8:8

Answer: Option D

Solution (By JKExamLibrary)

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

This question belongs to: Maths Ratio and Proportion

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Question #1 Report Error

If a:b = 7:10 and b:c = 10:9, then a:b:c = ?

A. 6:10:10

B. 7:10:9

C. 14:20:18

D. 7:11:9

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 7:10, b:c = 10:9 ⇒ a:b:c = 7:10:9.

This question belongs to: Maths Ratio and Proportion

Question #2 Report Error

If a:b = 2:4 and b:c = 4:4, then a:b:c = ?

A. 1:4:5

B. 2:5:4

C. 2:4:4

D. 4:8:8

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Correct Answer: Option C

Explanation:
Combine ratios: a:b = 2:4, b:c = 4:4 ⇒ a:b:c = 2:4:4.

This question belongs to: Maths Ratio and Proportion

Question #3 Report Error

Two numbers are in ratio 8:11. Their difference is 86. What is their sum?

A. 344

B. 304

C. 152

D. 427

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Correct Answer: Option B

Explanation:
Numbers 8k, 11k. Difference |8-11|k = 86 ⇒ k = 28. Sum = (8+11)k ≈ 304.

This question belongs to: Maths Ratio and Proportion

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