If a:b = 3:5 and b:c = 5:9, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 3:5 and b:c = 5:9, then a:b:c = ?

A. 3:6:9

B. 3:5:9

C. 6:10:18

D. 2:5:10

Answer: Option B

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 3:5, b:c = 5:9 ⇒ a:b:c = 3:5:9.

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1

If a:b = 8:3 and b:c = 3:6, then a:b:c = ?

A. 8:4:6

B. 16:6:12

C. 7:3:7

D. 8:3:6

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 8:3, b:c = 3:6 ⇒ a:b:c = 8:3:6.

This question belongs to: Maths Ratio and Proportion

Question #2

If a:b = 3:6 and b:c = 6:9, then a:b:c = ?

A. 3:6:9

B. 6:12:18

C. 3:7:9

D. 2:6:10

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 3:6, b:c = 6:9 ⇒ a:b:c = 3:6:9.

This question belongs to: Maths Ratio and Proportion

Question #3

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

A. 7:9:12

B. 6:8:13

C. 14:16:24

D. 7:8:12

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Correct Answer: Option D

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

This question belongs to: Maths Ratio and Proportion

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