If a:b = 2:3 and b:c = 3:9, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 2:3 and b:c = 3:9, then a:b:c = ?

A. 4:6:18

B. 1:3:10

C. 2:4:9

D. 2:3:9

Answer: Option D

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 2:3, b:c = 3:9 ⇒ a:b:c = 2:3:9.

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1

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Milk and water are in ratio 5:7 in a 476 L mixture. Quantity of milk?

A. 230 L

B. 396 L

C. 198 L

D. 278 L

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Correct Answer: Option C

Explanation:
Total parts = 12. Milk = [5 / (5+7)] × 476 = 198 L.

This question belongs to: Maths Ratio and Proportion

Question #2

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If a:b = 2:3 and b:c = 3:10, then a:b:c = ?

A. 2:3:10

B. 1:3:11

C. 2:4:10

D. 4:6:20

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 2:3, b:c = 3:10 ⇒ a:b:c = 2:3:10.

This question belongs to: Maths Ratio and Proportion

Question #3

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

A. 6:4:5

B. 7:5:4

C. 14:8:8

D. 7:4:4

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Correct Answer: Option D

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

This question belongs to: Maths Ratio and Proportion

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