If a:b = 5:6 and b:c = 6:9, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 5:6 and b:c = 6:9, then a:b:c = ?

A. 10:12:18

B. 5:7:9

C. 4:6:10

D. 5:6:9

Answer: Option D

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 5:6, b:c = 6:9 ⇒ a:b:c = 5:6:9.

This question belongs to: Maths Ratio and Proportion

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Question #1

If a:b = 8:6 and b:c = 6:9, then a:b:c = ?

A. 16:12:18

B. 8:7:9

C. 7:6:10

D. 8:6:9

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 8:6, b:c = 6:9 ⇒ a:b:c = 8:6:9.

This question belongs to: Maths Ratio and Proportion

Question #2

Find the mean proportional between 28 and 14.

A. 42

B. 22

C. 38

D. 19

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Correct Answer: Option D

Explanation:
Mean proportional = √(28 × 14) = √(392) = 19.

This question belongs to: Maths Ratio and Proportion

Question #3

If a:b = 4:4 and b:c = 4:9, then a:b:c = ?

A. 8:8:18

B. 4:4:9

C. 3:4:10

D. 4:5:9

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 4:4, b:c = 4:9 ⇒ a:b:c = 4:4:9.

This question belongs to: Maths Ratio and Proportion

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