If a:b = 8:9 and b:c = 9:7, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 8:9 and b:c = 9:7, then a:b:c = ?

A. 16:18:14

B. 8:9:7

C. 7:9:8

D. 8:10:7

Answer: Option B

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 8:9, b:c = 9:7 ⇒ a:b:c = 8:9:7.

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 14 and 40.

A. 54

B. 26

C. 23

D. 46

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Correct Answer: Option C

Explanation:
Mean proportional = √(14 × 40) = √(560) = 23.

This question belongs to: Maths Ratio and Proportion

Question #2

If a:b = 8:7 and b:c = 7:12, then a:b:c = ?

A. 7:7:13

B. 16:14:24

C. 8:7:12

D. 8:8:12

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Correct Answer: Option C

Explanation:
Combine ratios: a:b = 8:7, b:c = 7:12 ⇒ a:b:c = 8:7:12.

This question belongs to: Maths Ratio and Proportion

Question #3

Two numbers are in ratio 11:7. Their difference is 58. What is their sum?

A. 126

B. 350

C. 280

D. 252

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Correct Answer: Option D

Explanation:
Numbers 11k, 7k. Difference |11-7|k = 58 ⇒ k = 14. Sum = (11+7)k ≈ 252.

This question belongs to: Maths Ratio and Proportion

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