If a:b = 3:4 and b:c = 4:7, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 3:4 and b:c = 4:7, then a:b:c = ?

A. 2:4:8

B. 6:8:14

C. 3:4:7

D. 3:5:7

Answer: Option C

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 3:4, b:c = 4:7 ⇒ a:b:c = 3:4:7.

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1

Find the mean proportional between 23 and 54.

A. 70

B. 38

C. 35

D. 77

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Correct Answer: Option C

Explanation:
Mean proportional = √(23 × 54) = √(1242) = 35.

This question belongs to: Maths Ratio and Proportion

Question #2

If a:b = 6:9 and b:c = 9:11, then a:b:c = ?

A. 5:9:12

B. 6:10:11

C. 6:9:11

D. 12:18:22

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Correct Answer: Option C

Explanation:
Combine ratios: a:b = 6:9, b:c = 9:11 ⇒ a:b:c = 6:9:11.

This question belongs to: Maths Ratio and Proportion

Question #3

Find the mean proportional between 4 and 32.

A. 22

B. 11

C. 36

D. 14

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Correct Answer: Option B

Explanation:
Mean proportional = √(4 × 32) = √(128) = 11.

This question belongs to: Maths Ratio and Proportion

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