If a:b = 8:9 and b:c = 9:5, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 8:9 and b:c = 9:5, then a:b:c = ?

A. 8:9:5

B. 8:10:5

C. 16:18:10

D. 7:9:6

Answer: Option A

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 8:9, b:c = 9:5 ⇒ a:b:c = 8:9:5.

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 4 and 66.

A. 70

B. 32

C. 16

D. 19

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Correct Answer: Option C

Explanation:
Mean proportional = √(4 × 66) = √(264) = 16.

This question belongs to: Maths Ratio and Proportion

Question #2

If a:b = 4:9 and b:c = 9:8, then a:b:c = ?

A. 4:10:8

B. 8:18:16

C. 3:9:9

D. 4:9:8

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 4:9, b:c = 9:8 ⇒ a:b:c = 4:9:8.

This question belongs to: Maths Ratio and Proportion

Question #3

Two numbers are in ratio 8:6. Their difference is 142. What is their sum?

A. 660

B. 624

C. 287

D. 574

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Correct Answer: Option D

Explanation:
Numbers 8k, 6k. Difference |8-6|k = 142 ⇒ k = 71. Sum = (8+6)k ≈ 574.

This question belongs to: Maths Ratio and Proportion

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